Cable type for supplying 3 phase board

Hellmooth · Apr 28, 2016

Hi, I need to supply a new 3 phase DB from mains, the board will be supplying a couple of transformers which will be used for some machinery, it is in an office/unit style environment, was looking for some ideas with regards to how to run the cables, haven't done calcs yet but would be looking at 25mm supply to board, the machines draw roughly 40 amps and 2 at 16-20 amps. I was thinking of SWA on cable tray from the board to trannies and machinery, but for the supply cable would trunking and tails be more suitable? I will need to stick in a switch fuse for the tails as its is about 6 metres. Any info appreciated. Cheers.

davesparks · Apr 29, 2016

Hellmooth said:
Spoke to the supplier of the transformers and they stated that a type C or D would be fine, preferably a D but a C would manage.

That's a nice definite confirmation in writing which you can use to back up your design decisions!

Hellmooth · Apr 30, 2016

davesparks said:
That's a nice definite confirmation in writing which you can use to back up your design decisions!

It's cool I recorded the conversation, also looked into the laws related to recording phone conversations, think I might be alright in the court house...........but as back up I'm driving down to London to meet the guy and get him to sign a declaration of conformity, meeting a lawyer there as well he's going to record the whole meeting, all for £5k, bargain if you ask me.

davesparks · Apr 30, 2016

Hellmooth said:
It's cool I recorded the conversation, also looked into the laws related to recording phone conversations, think I might be alright in the court house...........but as back up I'm driving down to London to meet the guy and get him to sign a declaration of conformity, meeting a lawyer there as well he's going to record the whole meeting, all for £5k, bargain if you ask me.

You can take the pee all you like, but who is going to be carrying the can if nuisance tripping occurs and interrupts this business?