With thanks and a little help

[Davem]

Would like to say thank you to the old school on here done a fuse board change tested prior and found existing faults which included either arcing or wrong size cable 6mm to 9.5kw shower which is to small correct ? Also some neutrals and lives incorrect polarity at sockets. I have got to install a cooker circuit with a cooker load of 10.5kw according to the regs a 10mm cable is required ? Would think this is the same scenario for the shower am I within rights to disconnect shower and advise on downgrade of shower or upgrade of cable ??? Again thanks guys

 

[telectrix]

more old school advice......

6mm is good for shower (just) as long as no de-rating due to insulation. and 6mm on a 32A MCB will handle the cooker easily (think diversity).

 

[Davem]

more old school advice......

6mm is good for shower (just) as long as no de-rating due to insulation. and 6mm on a 32A MCB will handle the cooker easily (think diversity).

Thanks mate reasonably new to the game and still gettin to grips with different aspects I have my eleccsa assessment in 2 weeks time and the guys on here have helped my out no end with one thing and another keep lookin through all my books and stuff a gonna spend next half hour browsing diversity cheers mate

 

[Andy78]

What size protective device is on the shower circuit ?
And what does the oven manufacturers instruction's say about the electrical connection ?

 

[telectrix]

for a cooker. work out the amps from kW/volts. say that's 40A. then the design load is 10A + 30% or remainder, in this case 20A. add 5A if a socket outlet is incorporated.

 

[Davem]

Just looked at that telectrix in osg mate all makes sense now cheers and rewireable in shower is 45 amp :/

 

[Andy78]

Just looked at that telectrix in osg mate all makes sense now cheers and rewireable in shower is 45 amp :/

Off the top of my head that wont comply then. 6mm is good for 47A in perfect conditions, but given the derating factor for a 3036 device, it's not suitable.

EDIT: Hang on, you carried out a CU change, why is the shower on a rewireable fuse ?

 

[Davem]

So a small rated shower or bigger cable required for shower but like telectrix said 6mm for cooker is fine

 

[Davem]

Off the top of my head that wont comply then. 6mm is good for 47A in perfect conditions, but given the derating factor for a 3036 device, it's not suitable.

EDIT: Hang on, you carried out a CU change, why is the shower on a rewireable fuse ?

Sorry miss understanding I am doin the change tomorrow just tested today prior to change over

 

[Andy78]

Ah right, then the shower cable should be fine on a 40A MCB, provided, as Tel originally stated, that the cable doesn't get significantly derated along it's route due to installation methods.