shower problems Ask questions and find answers to many subjects relating to electrics and electrical work

[dougal]

i have just fitted a new shower to existing cable and plumbing, at first had no problems but, two weeks later the 30 amp fuse blew so I replaced it as it was about eleven years old so i thought problem solved,but one week later that one blew aswell,any ideas as to what ive done wrong?

[Jeffmo]

please give watts of shower and possible size of cable used .Then ideas will be forthcoming .Regards Jeff

[sparx]

HI check rating of new shower, ie each kWATT DRAWS ABT 4.2Aso if new one over7.5kW. it will melt fuse to protect circuit cable, thats its job!, regards SPARX

[dougal]

ive cheaked the rating its 10.5Kw does that mean I need to put in new cable

[sparx]

Hi agn Dougal, Most likely needs larger cable, isolator sw also may only be rated for 30A, 10.5 X 4.2A = 44.1 Amps so no wonder fuse melted!
If you are in England this is controlled service under part P of bldg regs so not DIY legally, regards SPARX

[dougal]

ok thanks sparx will get a pro in to do the job thanks for advice.dougal.