newfutile

Always supply a cpc to each fitting even if it’s unused at this time

GN3 advises against using mcb for functional switching , no problems from using contactors apart from isolation if fed from different...

If you do an R1+R2 test to each phase and earth you can add it to ZE and get your ZS which you need to test anyway , this also means you...

I am still trying to get my head around how anything could singe a faceplate screw while you are still working on the open socket...

only because there is a load ,if there is no current flowing the cpc will not be able to divert current to create the imbalance . it...

If its a neutral it will not trip the rcd or RCBO until some current is drawn (though it could be as little as 30 ma if the rcd trips at...

This sounds like as above a cable probably a live has been nicked and made the back box live , when the screw (which is earthed via the...

Why do you think that’s not a good way to test?

I brought up an error in the OSG in the IET forums about a B6 maximum ZS value 60898

That made me laugh , brilliant

Bear in mind it looks like twin and earth coming from the switch fuse , so i would think the left side of the cable should go live ,I...

A no contact tester will also allow you to test if the cable after the fuse is live at the correct time , it’s usually a good idea to...

I’m guessing the correct lives are in the new meter? Maybe worth getting a cheap no contact tester and hold it near the relavent...

I know suppliers at least round here have had trouble getting 5 terminal smart meters , im hoping they have not put a 4 terminal in, as...

Use the single core rating and apply grouping factors to de rate the cable