Compare VVGng and VVGng ls cable

The pow­er cable VVGng (vinyl-vinyl “bare” non-com­bustible) is designed to trans­mit direct cur­rent with volt­age up to 1000 V or alter­nat­ing cur­rent with volt­age from 660 V to 1000 V. It con­sists of sev­er­al cop­per con­duc­tors with vinyl insu­la­tion and a vinyl sheath (cam­bric), devoid of armor .

This cable prod­uct is used for the dis­tri­b­u­tion of elec­tric­i­ty in sta­tion­ary instal­la­tions. More­over, it exists in two ver­sions — VVGng and VVGng-ls. They dif­fer not only in the degree of resis­tance to flame, but also in some fea­tures of the work.

Both options are made with cur­rent-car­ry­ing sin­gle-wire cop­per con­duc­tors (alu­minum ver­sions also exist, but have a dif­fer­ent mark­ing — the let­ter “A” is present in their name). Tech­ni­cal and qual­i­ty char­ac­ter­is­tics of cable prod­ucts are reg­u­lat­ed by GOST 31996–2012.

These types are rec­om­mend­ed for use in rooms and places where there is a high risk of fire. For lay­ing con­ven­tion­al cur­rent-car­ry­ing routes in non-com­bustible mate­ri­als, their use may be redun­dant, although it all depends on the char­ac­ter­is­tics and fea­tures of the loca­tion.

Characteristics of the power cable VVGng

The VVGng pow­er cable is used in the fol­low­ing cas­es:

1. Lay­ing of cable routes in eco­nom­ic ter­ri­to­ries. In res­i­den­tial areas, it is accept­able for use, but it is not so wide­spread;

2. Place­ment in appro­pri­ate trays;

3. Lay­ing cur­rent-car­ry­ing tracks out­side build­ings, but not in the open.

Due to the non-com­bustible prop­er­ties of the cam­bric shell, it can ignite under the influ­ence of open fire, but at the same time it will not allow the flame to spread fur­ther along the route. Impor­tant! When ignit­ed, the braid of wires of the VVGng series emits a fair­ly large amount of smoke and cor­ro­sive gas­es — and that is why it is not rec­om­mend­ed to use it in res­i­den­tial premis­es.

It is pro­duced main­ly in two ver­sions — four-core and five-core. In the first case, its cross sec­tion is 90 mm²in the sec­ond — 120 mm². Solu­tions with a dif­fer­ent num­ber of cores also exist, but are not very wide­spread.

Instal­la­tion is allowed at tem­per­a­tures from ‑15 degrees Cel­sius. When form­ing a beam gas­ket under extreme tem­per­a­tures, it is nec­es­sary to place spe­cial heat­ing equip­ment for the cur­rent-car­ry­ing line every 100–150 meters.

Characteristics of the power cable VVGng-LS

Pow­er cable with low smoke emis­sion VVGng-LS (“LS” stands for low smoke) is used for lay­ing routes in res­i­den­tial premis­es. Unlike its pre­de­ces­sor, when ignit­ed, its cam­bric emits extreme­ly lit­tle smoke and cor­ro­sive gas­es. This is the rea­son for the scope of this cable.

For reduced smoke emis­sion, there is an addi­tion­al lay­er of chalk-filled rub­ber under the cam­bric shell. How­ev­er, options with vinyl fill­ing are also present. In both cas­es, the cam­bric is made from spe­cial poly­mers that dif­fer from those in the pre­de­ces­sor.

Also, the dif­fer­ence lies in the cross sec­tion. Four-core VVGng-LS has a cross sec­tion of 70mm²and five-core — 185 mm². There are sin­gle-wire, two-wire, and three-wire con­fig­u­ra­tions, but they are not very com­mon. In all cas­es, the cur­rent-car­ry­ing core is sin­gle-wire.

In addi­tion, the instal­la­tion of VVGng-LS is allowed at tem­per­a­tures from ‑25 degrees Cel­sius. But, just like its pre­de­ces­sor, when lay­ing a beam in frosty con­di­tions, the line must be heat­ed every 100–150 meters with spe­cial equip­ment.

It is also worth not­ing the exis­tence of VVG-FRLS cable prod­ucts. In fact, this is the same as this sub­species, but it is sim­ply labeled dif­fer­ent­ly. FR in this abbre­vi­a­tion stands for Fire Resis­tance, that is, “fire resis­tant” — in prin­ci­ple, the same as “non-com­bustible”.

There are also spe­cial ver­sions — HL, sup­port­ing oper­a­tion at tem­per­a­tures from ‑60 degrees Cel­sius; and T, which is resis­tant to the harm­ful action of molds.

Conclusion

The con­clu­sion is obvi­ous. VVGng can be used for lay­ing pow­er lines in util­i­ty and tech­ni­cal premis­es, as well as out­side them. VVGng-LS, in turn, is used in res­i­den­tial, office premis­es and com­mon areas.