storage heater CU

[empress]

need a few pointers with testing offpeak storage heaters CU
no prob with dead tests but what about the live tests Zs /Ze ?
don't think turning up at midnight when it comes live is an option
would you issue seperate test sheet for power/lighting CU & Offpeak CU or use a continuation sheet

elfyn

 

[andyb]

ze can be obtained by measuring at the main board, (it will be the same as the off peak)

zs can be calculated from this and r1+r2

 

[empress]

cheers for the reply
i agree on the Ze being the same at both points but was lead to believe the measured Zs value was the way to go with the calculated Zs as a cross check.
offpeak CU also has an 80amp 30ma rcd main isolator any thoughts on testing it
elfyn

 

[andyb]

Calculated zs is fine but obviously you need power to test the rcd.
If its a pir you are doing you could make a note to say that you were unable to test it.
Otherwise it's a case of livening it temporarly or a midnight visit.

 

[empress]

Calculated zs is fine but obviously you need power to test the rcd.
If its a pir you are doing you could make a note to say that you were unable to test it.
Otherwise it's a case of livening it temporarly or a midnight visit.

no its a EIC not a PIR ,changed both boards as they were old wylex rewirable's & the usual main earth gas & water incomer to 10mm as tncs supply.
tested everything apart form final offpeak CU measured Zs's & Main RCD
i left it locked off as no heating required at the moment but need to get it finished this week.
temp power lead it is then as i ain't doin a midnight run.
cheers elfyn