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5-46kV TR-XLPE URD Medium Voltage Utility Cables 1

5-46kV TR-XLPE URD Medium Voltage Utility Cables 2

5-46kV TR-XLPE URD Medium Voltage Utility Cables

5–46kV TR-XLPE URD Medium Voltage Utility Power Cables are specifically designed for underground residential distribution and utility power networks. Manufactured with high-quality copper or aluminum conductors and tree-retardant cross-linked polyethylene (TR-XLPE) insulation, these cables provide superior resistance to electrical treeing, moisture ingress, and long-term aging. The TR-XLPE insulation system significantly extends service life in underground installations where environmental stress and moisture exposure are common. Rated for voltage levels from 5kV to 46kV, the cable ensures stable and efficient power transmission under continuous operating conditions. Its robust construction supports direct burial or duct installation, meeting the reliability requirements of modern utility infrastructure. Designed to meet utility and industry performance expectations, TR-XLPE URD cables offer consistent electrical performance, enhanced durability, and reduced maintenance over their operational lifespan.

Standard ASTM B-231, AEIC CS8 , ICEA S-94-649/T-31-610/T-34-664 , UL 1072 MV-105

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Construction

Technical Specifications

Quality Control

Application

Construction

5-46kV TR-XLPE URD Medium Voltage Utility Cables

Conductor

Solid or Class B Compressed concentric strand Aluminum alloy 1350 or soft drawn annealed copper per ASTM

Insulation

Extruded, Tree-Retardant Cross-linked Polyethylene (TRXLPE) as defined in ANSI/ICEA S- 94-649 – 100% or 133% insulation level.

Conductor Shield

Extruded thermosetting semiconducting shield which is free stripping from the conductor and bonded to the insulation.

Insulation Shield

Extruded thermosetting semiconducting shield with controlled adhesion to the insulation providing the required balance between electrical integrity and ease of stripping

Metallic Shield

Soft annealed solid copper wires per ASTM B3, helically applied and uniformly spaced. Full or 1/3 Neutral.On request, alternate neutral construction and Water Swellable Powder (WSP)

Specifications

Maximum operating voltage:
• 5 kV – 46 kV, 100 and 133% IL
Maximum conductor operation
temperatures:
Wet and dry locations
For TR-XLPE
• Normal: 105 °C
• Emergency: 140 °C
• Short Circuit: 250 °C
For XLPE
• Normal: 90 °C
• Emergency: 130 °C
• Short Circuit: 250 °C

Options

- Black LLDPE jacket with no stripes
- Black PVC jacket sleeved over separator tape
- No Jacket
- Multiplex cables
- Tinned round and flat strap neutrals
- Compact stranded conductors
- Super smooth conductor shield
- UL MV-90 Rating if required
- 46kV

Technical Specifications

5-46kV TR-XLPE URD Medium Voltage Utility Cables

5 kV TR-XLPE Insulated

8 kV TR-XLPE Insulated

15 kV TR-XLPE Insulated

25 kV TR-XLPE Insulated

35 kV TR-XLPE Insulated

Copper 100% Insulation Level (90 mil)
Size AWG or kcmil	Number of Strands	1/3 Neutral					Full Neutral
		Number of Wires	Size	Jacket Thickness	Approximate Outside Diameter	Approximate Net Weight	Number of Wires	Size	Jacket Thickness	Approximate Net Weight
		Number of Wires	AWG	mil	in	lb/kft	Number of Wires	AWG	mil	lb/kft
2	7	6	14	60	0.83	472	16	14	60	606
1	19	7	14	80	0.87	551	13	12	80	775
1/0	19	9	14	80	0.95	697	16	12	80	922
2/0	19	11	14	80	1.00	826	13	10	80	1131
3/0	19	14	14	80	1.05	993	16	10	80	1359
4/0	19	18	14	80	1.10	1204	16	9	80	1662
250	37	13	12	80	1.19	1385	25	10	80	1961
350	37	18	12	80	1.29	1841	22	8	80	2656
500	37	17	10	80	1.49	2578	31	8	80	3678
750	61	20	9	110	1.77	3815	—	—	—	—
1000	61	26	9	110	1.91	4912	—	—	—	—
Aluminum 100% Insulation Level (90 mil)
2	7	6	14	60	0.83	330	10	14	60	383
1	19	6	14	80	0.91	395	13	14	80	489
1/0	19	6	14	80	0.95	431	16	14	80	564
2/0	19	7	14	80	1.00	488	13	12	80	676
3/0	19	9	14	80	1.05	567	16	12	80	792
4/0	19	11	14	80	1.10	657	13	10	80	962
250	37	13	14	80	1.16	741	16	10	80	1121
350	37	18	14	80	1.26	942	16	9	80	1400
500	37	16	12	80	1.45	1261	29	10	80	1908
750	61	15	10	110	1.76	1872	—	—	—	—
1000	61	16	9	110	1.93	2360	—	—	—	—

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Copper 100% Insulation Level (115 mil)
Size AWG or kcmil	Number of Strands	1/3 Neutral					Full Neutral
		Number of Wires	Size	Jacket Thickness	Approximate Outside Diameter	Approximate Net Weight	Number of Wires	Size	Jacket Thickness	Approximate Net Weight
		Number of Wires	AWG	mil	in	lb/kft	Number of Wires	AWG	mil	lb/kft
2	7	6	14	60	0.88	498	16	14	60	632
1	19	7	14	80	0.96	617	13	12	80	805
1/0	19	9	14	80	1.00	728	16	12	80	953
2/0	19	11	14	80	1.05	858	13	10	80	1163
3/0	19	14	14	80	1.10	1027	16	10	80	1393
4/0	19	18	14	80	1.15	1240	16	9	80	1697
250	37	13	12	80	1.24	1423	—	—	—	—
350	37	18	12	80	1.35	1881	—	—	—	—
500	37	17	10	80	1.54	2624	—	—	—	—
750	61	20	9	110	1.82	3870	—	—	—	—
1000	61	26	9	110	1.97	4972	—	—	—	—
Aluminum 100% Insulation Level (115 mil)
2	7	6	14	80	0.92	393	10	14	80	447
1	19	6	14	80	0.96	424	13	14	80	518
1/0	19	6	14	80	1.00	461	16	14	80	595
2/0	19	7	14	80	1.05	520	13	12	80	708
3/0	19	9	14	80	1.10	600	16	12	80	825
4/0	19	11	14	80	1.15	693	13	10	80	998
250	37	13	14	80	1.21	778	16	10	80	1158
350	37	18	14	80	1.31	983	16	9	80	1440
500	37	16	12	80	1.50	1307	29	10	80	1954
750	61	15	10	110	1.81	1927	—	—	—	—
1000	61	16	9	110	1.98	2419	—	—	—	—

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Copper 100% Insulation Level (175 mil)
Size AWG or kcmil	Number of Strands	1/3 Neutral					Full Neutral
		Number of Wires	Size	Jacket Thickness	Approximate Outside Diameter	Approximate Net Weight	Number of Wires	Size	Jacket Thickness	Approximate Net Weight
		Number of Wires	AWG	mil	in	lb/kft	Number of Wires	AWG	mil	lb/kft
2	1	6	14	80	1.05	610	16	14	80	743
2	7	6	14	80	1.05	610	16	14	80	743
1	19	7	14	80	1.09	694	13	12	80	883
1/0	19	9	14	80	1.13	808	16	12	80	1034
2/0	19	11	14	80	1.17	942	13	10	80	1247
3/0	19	14	14	80	1.22	1115	16	10	80	1481
4/0	19	18	14	80	1.28	1332	16	9	80	1790
250	37	13	12	80	1.37	1519	25	10	80	2095
350	37	18	12	80	1.49	2011	22	8	80	2826
500	37	17	10	80	1.66	2741	31	8	110	3947
750	61	20	9	110	1.94	4008	—	—	—	—
1000	61	26	9	110	2.12	5170	—	—	—	—
Aluminum 100% Insulation Level (175 mil)
2	7	6	14	80	1.05	467	10	14	80	520
1	19	6	14	80	1.08	501	13	14	80	595
1/0	19	6	14	80	1.12	541	16	14	80	675
2/0	19	7	14	80	1.17	603	13	12	80	791
3/0	19	9	14	80	1.22	687	16	12	80	912
4/0	19	11	14	80	1.27	784	13	10	80	1089
250	37	13	14	80	1.33	874	16	10	80	1253
350	37	18	14	80	1.46	1110	16	9	80	1568
500	37	16	12	80	1.62	1422	29	10	80	2069
750	61	24	12	110	1.89	2059	—	—	—	—
750	61	15	10	110	1.93	2065	—	—	—	—
1000	61	16	9	110	2.13	2616	—	—	—	—

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Copper 133% Insulation Level (220 mil)
Size AWG or kcmil	Number of Strands	1/3 Neutral					Full Neutral
		Number of Wires	Size	Jacket Thickness	Approximate Outside Diameter	Approximate Net Weight	Number of Wires	Size	Jacket Thickness	Approximate Net Weight
		Number of Wires	AWG	mil	in	lb/kft	Number of Wires	AWG	mil	lb/kft
2	7	6	14	80	1.14	672	16	14	80	805
1	19	7	14	80	1.18	759	13	12	80	947
1/0	19	9	14	80	1.22	875	16	12	80	1100
2/0	19	11	14	80	1.26	1012	13	10	80	1316
3/0	19	14	14	80	1.31	1187	16	10	80	1553
4/0	19	18	14	80	1.37	1407	16	9	80	1865
250	37	13	12	80	1.48	1622	25	10	80	2198
350	37	18	12	80	1.58	2097	22	8	80	2912
500	37	17	10	110	1.82	2943	31	8	110	4046
750	61	20	9	110	2.03	4118	—	—	—	—
1000	61	26	9	110	2.21	5291	—	—	—	—
Aluminum 133% Insulation Level (220 mil)
2	7	6	14	80	1.14	528	10	14	80	582
1	19	6	14	80	1.18	565	13	14	80	658
1/0	19	6	14	80	1.22	607	16	14	80	741
2/0	19	7	14	80	1.26	671	13	12	80	859
3/0	19	9	14	80	1.31	758	16	12	80	983
4/0	19	11	14	80	1.37	858	13	10	80	1163
250	37	13	14	80	1.44	975	16	10	80	1355
350	37	18	14	80	1.55	1195	16	9	80	1653
500	37	16	12	110	1.77	1622	29	10	110	2272
750	61	15	10	110	2.02	2175	—	—	—	—
1000	61	16	9	110	2.23	2737	—	—	—	—

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Copper 100% Insulation Level (260 mil)
Size AWG or kcmil	Number of Strands	1/3 Neutral					Full Neutral
		Number of Wires	Size	Jacket Thickness	Approximate Outside Diameter	Approximate Net Weight	Number of Wires	Size	Jacket Thickness	Approximate Net Weight
		Number of Wires	AWG	mil	in	lb/kft	Number of Wires	AWG	mil	lb/kft

1	19	7	14	80	1.26	820	13	12	80	1009
1/0	19	9	14	80	1.30	939	16	12	80	1164
2/0	19	11	14	80	1.34	1077	32	14	80	1358
3/0	19	14	14	80	1.42	1280	20	12	80	1361
4/0	19	18	14	80	1.47	1504	13	10	80	1382
250	37	13	12	80	1.56	1698	16	10	80	1646
350	37	18	12	80	1.66	2178	16	9	80	1961
500	37	17	10	110	1.90	3035	25	10	80	2274
750	61	20	9	110	2.14	4269	22	8	110	3102
1000	61	26	9	110	2.29	5403	31	8	110	4139
Aluminum 100% Insulation Level (260 mil)
1	19	6	14	80	1.26	626	13	14	80	719
1/0	19	6	14	80	1.30	670	16	14	80	804
2/0	19	7	14	80	1.34	736	13	12	80	925
3/0	19	9	14	80	1.41	849	16	12	80	1075
4/0	19	11	14	80	1.47	953	13	10	80	1258
250	37	13	14	80	1.53	1050	16	10	80	1430
350	37	18	14	80	1.63	1275	16	9	80	1842
500	37	16	12	110	1.85	1714	29	10	110	2363
750	61	15	10	110	2.13	2325	—	—	—	—
1000	61	16	9	110	2.31	2848	—	—	—	—

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Copper 133% Insulation Level (320 mil)
1/3 Neutral					Full Neutral
Size AWG or kcmil	Number of Strands	Number of Wires	Size	Jacket Thickness	Size AWG or kcmil	Number of Strands	Number of Wires	Size	Jacket Thickness
Size AWG or kcmil	Number of Strands	Number of Wires	AWG	mil	Size AWG or kcmil	Number of Strands	Number of Wires	AWG	mil
1/0	19	9	14	80	1 - 00	19	16	12	80
2/0	19	11	14	80	2 - 00	19	13	10	80
3/0	19	14	14	80	3 - 00	19	16	10	80
4/0	19	18	14	80	4 - 00	19	16	9	110
250	37	13	12	80	250	37	25	10	110
350	37	18	12	110	350	37	22	8	110
500	37	17	10	110	500	37	31	8	110
750	61	20	9	110	—	—	—	—	—
1000	61	26	9	110	—	—	—	—	—
Aluminum 133% Insulation Level (320 mil)
1/0	1	6	14	50	1 - 00	1	16	14	50
1/0	19	6	14	50	1 - 00	19	16	14	50
2/0	19	7	14	50	2 - 00	19	20	14	50
3/0	19	9	14	50	2 - 00	19	13	12	50
4/0	19	11	14	50	3 - 00	19	25	14	50
250	37	13	14	50	3 - 00	19	16	12	50
350	37	18	14	80	4 - 00	19	32	14	50
500	37	25	14	80	4 - 00	19	20	12	50
500	37	16	12	80	4 - 00	19	13	10	50
750	61	24	12	80	250	37	25	12	50
750	61	15	10	80	250	37	16	10	80
1000	61	31	12	80	350	37	32	12	80
1000	61	20	10	80	350	37	20	10	80
1000	61	16	9	80	350	37	16	9	80
—	—	—	—	—	500	37	29	10	80
—	—	—	—	—	750	61	28	8	80
—	—	—	—	—	1000	61	37	8	80

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Copper 100% Insulation Level (345 mil)
Number of Strands	Nominal OD Over Insulation	1/3 Neutral				Full Neutral
	Nominal OD Over Insulation	Number of Wires	Size	Jacket Thickness	Approximate Net Weight	Number of Wires	Size	Jacket Thickness	Approximate Net Weight
	in	Number of Wires	AWG	mil	lb/kft	Number of Wires	AWG	mil	lb/kft
19	1.09	9	14	80	1114	16	12	80	1397
19	1.15	11	14	80	1258	13	10	80	1652
19	1.20	14	14	80	1442	16	10	80	1896
19	1.25	18	14	80	1673	16	9	110	2305
37	1.31	13	12	110	1981	25	10	110	2596
37	1.41	18	12	110	2477	22	8	110	3371
37	1.54	17	10	110	3294	31	8	110	4448
61	1.73	20	9	110	4504	—	—	—	—
61	1.88	26	9	110	5654	—	—	—	—
Aluminum 100% Insulation Level (345 mil)
19	1.09	6	14	80	842	16	14	80	976
19	1.14	7	14	80	914	13	12	80	1102
19	1.19	9	14	80	1010	16	12	80	1235
19	1.25	11	14	80	1120	13	10	110	1533
37	1.30	13	14	110	1330	16	10	110	1714
37	1.40	18	14	110	1572	16	9	110	2036
37	1.53	16	12	110	1969	29	10	110	2619
61	1.74	15	10	110	2560	—	—	—	—
61	1.89	16	9	110	3099	—	—	—	—

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Copper 133% Insulation Level (420 mil)
Size AWG or kcmil	Number of Strands	Nominal OD Over Insulation	1/3 Neutral					Full Neutral
		Nominal OD Over Insulation	Number of Wires	Size	Jacket Thickness	Approximate Outside Diameter	Approximate Net Weight	Number of Wires	Size	Jacket Thickness	Approximate Net Weight
		in	Number of Wires	AWG	mil	in	lb/kft	Number of Wires	AWG	mil	lb/kft
1 - 00	19	1.25	9	14	80	1.65	1264	16	12	80	1489
2 - 00	19	1.30	11	14	110	1.76	1517	13	10	110	1827
3 - 00	19	1.35	14	14	110	1.81	1709	16	10	110	2080
4 - 00	19	1.40	18	14	110	1.86	1948	16	9	110	2412
250	37	1.46	13	12	110	1.95	2160	25	10	110	2738
350	37	1.56	18	12	110	2.08	2716	22	8	110	3537
500	37	1.69	17	10	110	2.26	3499	31	8	110	4603
750	61	1.88	20	9	110	2.47	4728	—	—	—	—
1000	61	2.03	26	9	110	2.62	5892	—	—	—	—
Aluminum 133% Insulation Level (420 mil)
1 - 00	19	1.25	6	14	80	1.64	990	16	14	80	1124
2 - 00	19	1.29	7	14	110	1.75	1173	13	12	110	1363
3 - 00	19	1.34	9	14	110	1.80	1276	16	12	110	1504
4 - 00	19	1.40	11	14	110	1.86	1395	13	10	110	1705
250	37	1.45	13	14	110	1.91	1507	16	10	110	1891
350	37	1.56	18	14	110	2.04	1807	16	9	110	2271
500	37	1.68	16	12	110	2.21	2172	29	10	110	2821
750	61	1.89	15	10	110	2.46	2782	—	—	—	—
1000	61	2.04	16	9	110	2.63	3335	—	—	—	—

The above data are approximate and subject to normal manufacturing tolerances. Other sizes available upon request.

Ampacities: Refer to beginning of section.

Quality Control

5-46kV TR-XLPE URD Medium Voltage Utility Cables

Raw Material Test

Raw Material Test is the initial quality assurance step for 5–46kV TR-XLPE URD Medium Voltage Utility Power Cables. Conductors are tested for electrical conductivity, tensile strength, elongation, and dimensional accuracy. TR-XLPE insulation compounds undergo extensive evaluation for tree-retardant performance, thermal aging, dielectric strength, and insulation resistance. Semi-conductive shielding materials are inspected for compatibility, uniformity, and conductivity. All raw materials are verified against utility and industry technical requirements before approval for production, ensuring long-term reliability and consistent electrical performance of the finished cable.

Process inspection

Process Inspection controls every manufacturing stage of 5–46kV TR-XLPE URD Medium Voltage Utility Power Cables. Conductor stranding is monitored for uniformity and correct lay length. Insulation extrusion and cross-linking processes are carefully controlled to ensure optimal TR-XLPE properties. Semi-conductive shielding application is inspected to maintain smooth interfaces and stable electrical stress control. In-process electrical testing is conducted throughout production to detect defects early. Continuous dimensional and visual inspections ensure compliance with design specifications and utility standards.

Finished Product

Finished Product Test validates the safety and performance of 5–46kV TR-XLPE URD Medium Voltage Utility Power Cables before delivery. Electrical tests include conductor resistance measurement, partial discharge testing, and AC voltage withstand testing. Mechanical tests assess insulation integrity and overall construction quality. Final inspection confirms correct marking, dimensions, and workmanship. Only cables meeting all test criteria are released for shipment.

Application

Widely used in underground residential distribution systems, utility power networks, substations, and infrastructure projects requiring reliable medium voltage underground cables.

Renewable Energy

Power & Energy Industry

Transport Sector

Real Estate & Construction

Infrastructure & Municipal Industry

Data Centers

Mining and Oil & Gas Industry

Industrial Manufacturer

Technical Advantages

● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions

Conductor Stranded Work Shop

CCV Production Line

CCV production 01

Partical Voltage Test Labtoary

Auto-Winding Machine

Oil Chromatography Test Machine

Auto-core cutting machine

Basic Insulation Level Test Labtoary

Auto Laser Cutting Machine

Automatic Desanding Machine

Automatic Dryer Machine

Product Packaging

Wires and Cables packaging (1)

Wires and Cables packaging (2)

Wires and Cables packaging (3)

Wires and Cables packaging (4)

Wires and Cables packaging (5)

Wires and Cables packaging (6)

Wires and Cables packaging (7)

Wires and Cables packaging (8)

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FAQ From Customers

What are the advantages of power cables and overhead lines?

(1) Reliable operation, because it is installed in a hidden place such as underground, it is less damaged by external forces, has less chance of failure, and the power supply is safe, and it will not cause harm to people;
(2) The maintenance workload is small and frequent inspections are not required;
(3) No need to erect towers;
(4) Help improve power factor.

Which aspects should be considered when choosing the cross section of a power cable?

(1) The long-term allowable working current of the cable;
(2) Thermal stability once short circuited;
(3) The voltage drop on the line cannot exceed the allowable working range.

What are the measures for cable fire prevention?

(1) Use flame-retardant cables;
(2) Use fireproof cable tray;
(3) Use fireproof paint;
(4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.;
(5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.

What should be paid attention to during the transportation and handling of cables?

(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat.
(2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.

What inspections should be carried out for the acceptance of cable lines?

(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear;
(2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements;
(3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements;
(4) Good grounding;
(5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted;
(6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.

How many projects can cable engineering be divided into?

(1) Construction site transportation: including the loading and unloading, transportation and empty vehicle return journey of engineering materials from the warehouse to the construction site.
(2) Local engineering: including road excavation, tunnel, trench construction, etc.
(3) Laying engineering: including laying, intermediate head production, lift cover plate, buried pipe, school tide, tractor head production, etc.
(4) Two-end engineering: including the production and installation of support, suspension bridge and its foundation, the production of terminal heads, the installation of oil pressure and signal devices, and the electrical performance testing of various types.
(5) Stopping works: including the production of oil-filled cable stop heads, the installation of fuel supply tanks, automatic drainage and signal devices, etc.
(6) Grounding engineering: including installation of insulation joints, transposition boxes, protectors, and grounding boxes.

What tests and inspections should be carried out on power cables before laying?

Before laying, check whether the type, specification and length of the cable meet the requirements and whether there is external force damage. Low-voltage cables use a 1000V megohmmeter to remotely measure the insulation resistance, and the resistance is generally not less than 10MΩ. High-voltage cables use a 2500V megger to measure the resistance. Generally not less than 400MΩ.

What are the factors that determine the long-term allowable current carrying capacity of the cable?

(1) The long-term allowable working temperature of the cable;
(2) The heat dissipation performance of the cable itself;
(3) The condition of the cable installation and the heat dissipation conditions of the surrounding environment.

According to the difference of insulation and protective layer, what are the main types of commonly used low-voltage power cables?

(1) Oil-impregnated paper insulated lead-clad (or aluminum-clad) power cable;
(2) Non-drip oil-impregnated paper insulated power cable;
(3) PVC insulated and sheathed power cable;
(4) Cross-linked PVC insulated and PE sheathed power cable;
(5) Cross-linked PVC insulated and sheathed power cable;
(6) Rubber insulated power cables.

What are the requirements for the fire blocking of cable holes?

For larger cable penetration holes, such as the cable penetration floor, etc., when using fireproof blocking materials to block, according to the actual situation, first coat four to six layers of fireproof paint on the cable surface, the length is about 1.5m below the hole, and then use fire-resistant The material is processed into a board-supporting fire-proof blocking material with a certain strength to ensure that it is firm after being blocked and is easy to disassemble and assemble when the cable is replaced. The plugging is dense and non-porous to effectively block smoke and fire.

What are the main properties of the insulation material of the power cable?

(1) High breakdown strength;
(2) Low dielectric loss;
(3) Very high insulation resistance;
(4) Excellent discharge resistance;
(5) It has certain flexibility and mechanical strength;
(6) Long-term insulation performance is stable.

What are the regulations for cable protection tubes?

(1) When the cable needs to be laid through a protective pipe, the inner diameter of the pipe should not be less than 1.5 times the outer diameter of the cable, and the inner diameter of the concrete pipe, clay pipe, asbestos, and cement pipe should not be less than 100mm;
(2) The bending radius of the cable tube should meet the requirements of the bending radius of the cable inserted;
(3) Each pipe should not exceed three elbows at most, and there should be no more than two right-angle bends.

How to measure the outer diameter of the cable sheath?

At five evenly distributed points on the circumference of the sheath, measure the outer diameter of the sheath and its average value. The average outer diameter is the outer diameter of the sheath.

How to connect copper core cables with different cross-sections?

Copper core cables with different cross-sections can be connected by open-back weak copper pipes and connected by soldering, or pure copper rods can be connected into copper pipes according to different cross-sectional requirements and connected by crimping.

What are the insulating materials used to make cable terminal heads or intermediate joints?

There are insulating glue, insulating tape, insulating tube, insulating gloves, insulating resin, etc.

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