A lighting CB wont re-set and shower CB rating query.

[GLENNSPARK]

table 1b appendix 1 p(97) OSG for diversity allowances.......

 

[dingledong]

and what does that say
as your saying that a 9.5 kw shower in use including voltage drop does not run over 40 amps

 

[andekoch]

Agreed glenspark, that is why I left the 40A rcbo. Any way the operating temp is around 50-60 degrees I recall with a trip time of around an hour at I=1.15xIn or thereabouts.

 

[GLENNSPARK]

and what does that say
as your saying that a 9.5 kw shower in use including voltage drop does not run over 40 amps

so you are using 10mm cable...ok....nothing wrong with a 40A mcb for this circuit as i have already said......wont be used at full pelt....or if it is..it wont be for long...owch!!

 

[alw94]

Cheers for the quick replies. I need to check it was a 9.5kw because something made me go up to the 50a rather than the 40a. It may be that it was a 10.5 but I haven't got my notes to hand. If I phone them they won't know either. I used this for my assessment and nothing was mentioned then.

Any tips on the lighting circuit as, if I have to go, it'll have to be done in a day, as I haven't the time to stay longer. Not looking forward to this as it's a 5am start and won't get back to 9-10pm depending on what needs to be done.

 

[GLENNSPARK]

Cheers for the quick replies. I need to check it was a 9.5kw because something made me go up to the 50a rather than the 40a. It may be that it was a 10.5 but I haven't got my notes to hand. If I phone them they won't know either. I used this for my assessment and nothing was mentioned then.

Any tips on the lighting circuit as, if I have to go, it'll have to be done in a day, as I haven't the time to stay longer. Not looking forward to this as it's a 5am start and won't get back to 9-10pm depending on what needs to be done.

so did you ask the inevitable question.."have you had any work done sinse i was here last"?.....IR mate on the offending circuit......at the board first to verefy theres either a short circuit or a breakdown in insulation and remember to disconnect anything electronic being fed from this circuit first wont you mate as you could fry it..lol....

 

[GLENNSPARK]

then if/when you have verefied theres an IR problem then you can seperate the circuit at the various points on the string......till you find the portion thats causing it....test strappers in both directions wont you n all as it may be something they`v hammered into the wall...hanging pictures or whatever..lol.....

 

[Amp David]

Our 9.5 kw mira pulls 34 amps when its turned to max! Always has done

 

[GLENNSPARK]

Our 9.5 kw mira pulls 34 amps when its turned to max! Always has done

well this is the thing David.....

 

[keniff]

10mm twin and earth depending on the installation method ie clipped direct can be rated at 63 amps check the current capability of the cable in the way that it's installed a 50 amp breaker may be fine, regardless of the power of the shower being less