Wire Strand Cutting

[Cloud]

Good day everyone. I'm new to this forum and here is my first post.

Do we have any code regarding the cutting of strands? 6mm was changed to 10mm but the slot of the receptacle was not considered. The design team wants to just cut 2 strands of the core for it to fit the terminals.

I know it is pure commonsense, but HEY, I'm here as a support at Vietnam. :roll:

Thanks and happy learning.

 

[renosteinke]

Why was the wire size changed?

If you only wanted to use the larger wire for voltage drop reasons, then trimming the wire to fit is allowed. Indeed, there are crimp fittings made for just this purpose.

If you need the larger wire because of the amount of current the wire is carrying, then you are not allowed to trim the wire to fit, or use one of those reducers.

 

[kwired]

Why was the wire size changed?

If you only wanted to use the larger wire for voltage drop reasons, then trimming the wire to fit is allowed. Indeed, there are crimp fittings made for just this purpose.

If you need the larger wire because of the amount of current the wire is carrying, then you are not allowed to trim the wire to fit, or use one of those reducers.

How do you know when you have trimmed too much? I suggest using a termination or splicing device, and splice the allowable size conductor on to the larger one before landing on the receptacle.

If the increase was for voltage drop. If it was for increased circuit capacity you may no longer have a receptacle that is allowed on the increased circuit size.

 

[Cloud]

thanks for the reply. I think it is to compensate voltage drop. My initial suggestion to them is to change the type of cable lug use rather than to change the receptacle rating. :thumbsup:

OT: for us to save bandwidth, is there any code from NEC / BS7671 or 70E requiring the contractor to send their testers to calibration first, even if it is brand new? I think there is something regarding this, but stated on ISO 9000?