Stripping TE Cable

[khushj]

Stripping TE by using the the cpc can stretch the unprotected cpc and lead to thinning of the cross sectional area, which in turn can affect the cables resistance. Discuss.

I have seen this stated on various sites.

Yes this is true but the csa will only change very slightly due to the force applied.

Lets suppose we have a 1m length of TE with 1mm cpc.
Using stress/strain relationship for copper ( Young's modulus) then a force of 10000Newtons will be required to stretch the cpc by 0.09mm ie 9 hundredths of a mm.!! The force can be equated back to a weight of 1000Kg.

So if a weight of 1000Kg is applied to the cpc then it stretches 0.09mm, this is hardly going to affect the cross sectional area of the cpc.

Tthe force required to strip the TE is most likely to be around 100N, ie 10Kg, this will stretch the cpc by 0.0009mm. This will result in the cpc cross section changing very very very very very slightly.

Therefore using the cpc to strip TE is hardly going to affect the cross section of the cpc when using it to strip the outer sheath. This in turn will not affect the cpc resistance either.

 

[Des 56]

I had never thought about the stretching of the cpc before

Having stripped twin and earth for eons using the cpc, there must be untold dwellings with undersised cpcs that I performed on

 

[SirKit Breaker]

I do this all the time, never had any problems, i leave enough cable to be able to strip back and cut off the bit i've had my pliers on. Cant see the resistance altering enough to make a difference really, a bit over the top in my opinion......but that is my opinion.

 

[Amp David]

Think the PVC outer is going to give way before the copper begins to stretch though.

 

[Spudnik]

Same here....

 

[Guest123]

I've always used CPC to strip....and i know I cant exert a force of 10000N.

 

[pennywise]

I always keep a small rodent handy or an apprentice ( same thing really )to chew the outer sheath off

 

[sparks1234]

I've always found it awkward to strip with CPC so snip between the CPC and one of the outer cores