shower

[D Brennan]

Just looked at a job, old shower not working, 10kw shower on a 6mm, 45 amp breaker , all connections burnt.

Ive told them they two options, replace shower for a lower power one or run a 10mm t+e in, they have gone for cheapest option of changing shower.

I aint fitted a shower now in years and when looking they all seem to be 8.5kw or above, can this go on a 6mm as by my working out 8.5kw comes to roughly 36 amp?

Shower has no RCD protection at present, am i ok to leave as is and straight swap or should i be rcd'ing the circuit?

Cheers in advance

 

[avinalarf]

Hi D

Looking at the BRB - table4D5, depending on the the reference method, 6mm has a ccc ranging from 23.5A (in a stud wall with thermal insulation & cable not touching inner wall surface) to 47A (clipped direct).

Personally I would RCD that circuit - possibly RCBO???

 

[D Brennan]

Hi DLooking at the BRB - table4D5, depending on the the reference method, 6mm has a ccc ranging from 23.5A (in a stud wall with thermal insulation & cable not touching inner wall surface) to 47A (clipped direct).

Personally I would RCD that circuit - possibly RCBO???

very old crabtree board, would be a struggle to find rcbo to fit, got the wholesale on the job. Cable underfloors, then into trunking, through a studwall and into loft to pull switch

 

[Theorysparky]

could use a seperate rcd

it could be argued that like for like swap,,,,no dangerous than before u started

 

[Evans Electric]

8.5 - 9.0 KW OK on the 6mm but I would'nt leave it without an RCD . If they don't want to pay don't do it.

You can get the old style C/tree if they order one.

Deke

 

[Andy™]

could use a seperate rcdit could be argued that like for like swap,,,,no dangerous than before u started

but not installed to manufacturers instructions

easiest thing to do would be as theory says - RCD between MCB and shower. depending on length/installation method, you should easily be able to use an 8.5KW with 6mm

 

[Subneural]

TLC:

http://www.tlc-direct.co.uk/Products/TTT70XRslash7W.html

Triton 7.5kW Shower

 

[Theorysparky]

but not installed to manufacturers instructionseasiest thing to do would be as theory says - RCD between MCB and shower. depending on length/installation method, you should easily be able to use an 8.5KW with 6mm

 

[jl-heating]

compulsary on a shower, rcd protection even on a like for like swop.

 

[Theorysparky]

compulsary on a shower, rcd protection even on a like for like swop.

where does it say that..........

 

[jl-heating]

in my post, prey tell under what circumstances would you not fit an rcd on a shower install . ??

 

[Theorysparky]

in my post, prey tell under what circumstances would you not fit an rcd on a shower install . ??

Jl

i was refering to a straight swap of a like item

a new shower install i would rcd it

you dont have to rcd a ring cct when you change a socket

 

[SPECIAL LOCATION]

Just looked at a job, old shower not working, 10kw shower on a 6mm, 45 amp breaker , all connections burnt.Ive told them they two options, replace shower for a lower power one or run a 10mm t+e in, they have gone for cheapest option of changing shower.

I aint fitted a shower now in years and when looking they all seem to be 8.5kw or above, can this go on a 6mm as by my working out 8.5kw comes to roughly 36 amp?

Shower has no RCD protection at present, am i ok to leave as is and straight swap or should i be rcd'ing the circuit?

Cheers in advance

9500w @ 230v = 41A

6.0mm clipped direct or in masonry (method C), with no major insulation issues can carry 46A

May need to check length of run for volt drop.

If its an old property probably not buried in truck loads of insulation,

so stick 40A MCB & up to 9.5K as per loads of properties which are working perfectly well.

I would most likely go 9.0k or 9.5k (If you read the small print, the 9.5k rating on the box is normally @ 240v NOT 230v)

AND I would stick a standalone RCD on the circuit, (allow

 

[Andy™]

compulsary on a shower, rcd protection even on a like for like swop.

not compulsory. there are cases where its not required

 

[jl-heating]

when would you not fit an rcd on a shower ??? i honestly dont know. ??

 

[Andy™]

when would you not fit an rcd on a shower ??? i honestly dont know. ??

regs do not require it. only needs fitted to protect cable (if req'd), or if the manufacturers instructions say it must be RCD'd

i still make sure there is always an RCD for showers though, even if its not required

 

[jl-heating]

req for rcd, All circuits in a bath or shower room.(cant find a reg )

i cant find anywere an option for not fitting 1 on a shower. ??

 

[Andy™]

req for rcd, All circuits in a bath or shower room.(cant find a reg )i cant find anywere an option for not fitting 1 on a shower. ??

depends on shower. i have seen some where shower is outside the room, and pipe feeds into bathroom. this would not require RCD (but if controls are electronic from inside, then it would)

under 16th, RCD covering all of bathroom wasnt required

 

[jl-heating]

ahhh never thought of the remote type..