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Cable leads
Copper round multi-wired (class 5 GOST 22483-77).

Insulation of main and auxiliary leads
PVC reduced hardness compound.

Screen over the main leads
Electroconductive plastic compound.

Grounding lead
Copper round without insulation (for 4 and 7 lead cable).
For cables with 6 main leads the grounding lead is bundled and consists of three separate leads, total cut of which equals to at least 10 mm². Over each separate lead of the grounding lead there shall be laid a flexible elctroconductive plastic compound screen.

Auxiliary leads
In 7 lead cables insulated auxiliary leads are stranded to each other, they are coated with a PVC shell or tape winding.
In cables with six main leads four insulated auxiliary leads and three screened grounding leads are stranded to each other into a core.
The core is covered with a flexible electroconductive plastic compound screen.

General twisting
In 4-lead cables screened main leads and grounding lead are stranded to each other, and in 7-lead cables screened main leads and a group of auxiliary leads in a shell or winding are stranded around the grounding lead.
Main insulated cable leads with six main leads are stranded around the screened cable core.

Wrapping
Stranded cable leads are covered with filled-in one or two-layer wrapping made of low hardness PVC compound.

Cables are designed for connecting of mine machines and devices to the circuit: - for nominal voltage up to 1.14 kV of up
to 50 Hz frequency for main, and up to 0.22 kV of up to 50 Hz — for auxiliary leads;

Cables are designed for operation at ambient temperature ranging from —30�C up to +50�C and 98+-2 % relative humidity at temperature of (35+2)�C.

Electric resistance of leads to direct current evaluated in 1 km length and temperature of 20�C, at acceptance and delivery for main and grounding leads shall comply with GOST 22483;
— for auxiliary leads of 1.5 mm� cut — not lower than 15.7 Ohm; 
— 2.5 mm� — not more than 8.85 Ohm; 
— 4.0 mm� — not more than 5.80 Ohm;

Electric insulation resistance of evaluated in 1 km length and temperature of 20�C, at acceptance and delivery shall be: 
— for main leads — at least 50 MOhm; 
— for auxiliary leads — at least 20 MOhm.

Electric resistance of screens of cable main leads at 20�C shall not exceed 1.5 kOhm.

Insulated cable leads stand ��-2 test by alternate voltage according to GOST 23286.

Cables stand test by alternate voltage of 50 Hz frequency within 5 minutes without putting into water at acceptance and delivery, kV: 
— 3.5 — for main leads for 1.14 kV voltage; 
— 9.5 — for main leads for 3.0 kV voltage; 
— 1.5 — for auxiliary leads;

����� cables are bend-resistant due to axle twisting and stand number of cycles as shown in the Table 1.

Constriction length of cables shall be at least 200 m. Allowed delivery — cables at least 50 m long in amount of at least 20% including not more than 5% long up to 100 m. By client's option cables may be of other length.

Cables do not conduct burning when single laid. Oxygen index of the jacket — at least 27%.

Cables are resistant to lubricating oil and diesel oil. Cables are sealed.

Durability — at least 1.5 years.

Table 1

Nominal cut of main leads, mm�	4-lead cables		7-lead cables		Six main leads cables
	Number of cycles	Angle of torsion ±π rad.	Number of cycles	Angle of torsion ±π rad.	Number of cycles	Angle of torsion ±π rad.
4,0	4000	7	4000	6	—	—
6,0	4000	6	4000	5	—	—
10	4000	5	4000	5	—	—
16	4000	5	4000	4	3000	3
25	4000	4	4000	4	3000	3
35	4000	4	4000	3	2500	3
50	3000	4	3000	3	2500	3
70	3000	3	3000	3	2000	3
95	3000	3	3000	3	—	—
120	2500	3	2500	3	—	—

Cables may be used as a part of chain cable layingout machines, provided cable laying-out machines shall provide cable laying without clamping.
Minimal permitted bending radius shall be at least five outer diameters of the cable value.

Reheat temperature permitted for a long period shall not exceed 75�C.

Current loads of cables at long term permitted reheat temperature with the ambient temperature of 25�C shall not exceed values given in the Table 2.

Manufacturer certifies quality compliance to the present standard requirements provided the terms of operation, storage and installation are observed.

Warranty assurance constitutes 6 months from the date of putting the cables into operation.

Table 2

Nominal cut of main leads, mm�	Current loads for cables long term reheat temperature of which constitutes 75�C, A
4.0	45
6.0	58
10	75
16	105
25	136
35	168
50	200
70	250
95	290
120	331

Number of leads and nominal cut, mm�	Nominal outer diameter, mm	Estimated weight of 1 km cable, kg	Number of leads and nominal cut, mm�	Nominal outer diameter, mm	Estimated weight of 1 km cable, kg
3×4.0+1×2.5	23.4	740	3×120+1×10+3×2.5	62.2	7142
3×6.0+1×4.0	26.9	992	3×16+1×10+3×4.0	36.6	2081
3×10+1×6.0	29.6	1277	3×25+1×10+3×4.0	40.8	2700
3×16+1×10	33.6	1745	3×35+1×10+3×4.0	44.3	3295
3×25+1×10	38.6	2300	3×50+1×10+3×4.0	47.1	3938
3×35+1×10	40.9	2746	3×70+1×10+3×4.0	51.5	4918
3×50+1×10	43.5	3331	3×95+1×10+3×4.0	57.3	6068
3×70+1×10	48.6	4321	3×120+1×10+3×4.0	62.2	7170
3×95+1×10	55.6	5596	6×25+3×3.5+4×2.5	52.4	4516
3×120+1×10	62.2	6963	6×35+3×3.5+4×2.5	54.6	5253
3×4.0+1×2.5+3×1.5	26.4	951	6×50+3×4.0+4×4.0	58.2	6461
3×6.0+1×4.0+3×2.5	29.2	1203	6×70+3×4.0+4×4.0	62.8	8045
3×10+1×6.0+3×2.5	33.2	1608	3×25+3×16+3×3.5+4×2.5	52.4	4372
3×16+1×10+3×2.5	36.6	2061	3×35+3×16+3×3.5+4×2.5	54.6	4882
3×25+1×10+3×2.5	40.8	2670	3×35+3×25+3×3.5+4×2.5	56.4	5262
3×35+1×10+3×2.5	44.3	3267	3×50+3×25+3×4.0+4×4.0	58.2	5898
3×50+1×10+3×2.5	47.1	3910	3×50+3×35+3×4.0+4×4.0	59.8	6371
3×70+1×10+3×2.5	51.5	4889	3×70+3×35+3×4.0+4×4.0	62.8	7262
3×95+1×10+3×2.5	57.3	6039	3×70+3×50+3×4.0+4×4.0	63.0	7626