Installing American in Uk

[opm electrical]

Im doing work on an American site in the U.K. and installing us socket outlets through a transformer.
Does anyone know what I should install as far as rcds go and also the Zs readings I should expect.
Also on another site the generate 100/208 60Hz. And im installing supply cables to a DB. Are there any other factors to take into consideration when working out current rating/cable size and max Zs values.

Ollie

 

[Lucien Nunes]

Are you installing to BS7671 or the NEC?

If working to the NEC, their specs for GFCI's are rather different to ours for RCDs, not least because on a 120V circuit they can be made much more sensitive without nuisance tripping. Permissible Zs values for a given OCPD are dependent on voltage, so you may need manufacturers data if using BS devices on voltages not tabulated in BS7671.

 

[opm electrical]

Well I suppose it’s a question to be asked. I’ll have to see if I can get hold of a copy of the NEC. The installation is bs1671 but a deviation for the outlets. They’re fed through a transformer.
The 60Hz site is a different one to get my head around. It’s swa coming from a 120/208 panel going to a DB for others to connect to.
I’ll have to ask the Americans next time I’m on site.
It’s a totally new one on me so I’m having to put the homework in, especially on the certifying side of things, and the niceic just said put a deviation in.

 

[Pete999]

Well I suppose it’s a question to be asked. I’ll have to see if I can get hold of a copy of the NEC. The installation is bs1671 but a deviation for the outlets. They’re fed through a transformer.
The 60Hz site is a different one to get my head around. It’s swa coming from a 120/208 panel going to a DB for others to connect to.
I’ll have to ask the Americans next time I’m on site.
It’s a totally new one on me so I’m having to put the homework in, especially on the certifying side of things, and the niceic just said put a deviation in.

 

[Pete999]

When I was in work, we needed to buy lots of 110Volt sockets from MK, the wholesaler made us sign a waiver that told them we were installing the overseas and not in the UK, so you may have some problems in the future if you use US stuff, just saying, as for the NICEIC what do they know about it, probably diddly squat.

 

[Toneyz]

When I was at work, we needed to buy lots of 110Volt sockets from MK, the wholesaler made us sign a waiver that told them we were installing the overseas and not in the UK, so you may have some problems in the future if you use US stuff, just saying, as for the NICEIC what do they know about it, probably diddly squat.

It may have been to do with export tax as you see these outlets in manufacturers catalogues sockets for export only. I know the NICEIC get a bit of a bad press on here together with the other part P scams but on their technical side, they do have some knowledgeable engineers.

 

[RWJ]

I'm sure there was a download link on here (a while ago) for the NEC I remember downloading it. Might have been Tony uploaded it???

You could always get the cable from TerryNye's mate lololol

 

[Pete999]

It may have been to do with export tax as you see these outlets in manufacturers catalogues sockets for export only. I know the NICEIC get a bit of a bad press on here together with the other part P scams but on their technical side, they do have some knowledgeable engineers.

Nothing whatsoever to do with export taxation.

 

[opm electrical]

I’ve not had any problems getting the outlets at all. I get what you mean about the tax side of things because there’s American shops that I’m not allowed to buy stuff in because I won’t pay Uk tax

 

[Toneyz]

Nothing whatsoever to do with export taxation.

Ok, just thought it was a reason why you had to sign a waiver.