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Been on a refurb today and i've 1st fixed the kitchen, when the builder came this afternoon he said that the boiler supply needs to be on a dedicated circuit......... is this right? and if so why?

Mark
 
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Shakey

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  • #2
Been on a refurb today and i've 1st fixed the kitchen, when the builder came this afternoon he said that the boiler supply needs to be on a dedicated circuit......... is this right? and if so why?

Mark
well the regs call for seperate circuits for water heaters over a certain size (think its 25 litres?), but i believe this more to do with immersion hjeatrs rather than gas boilers (which i think is what you are talking about)

aint got the regs in front of me!
 
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heathelect

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  • #4
hiya mark, it doesnt have to go on its own cct, but remember if you connect it to a ring via a spur and a fault does develop uneccesary tripping may occur, as general practice i try and put a dedicated circuit in for a boiler.hope that helps.dave
 
Z

zupos40

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  • #5
No it not a requirement of BS7671:2008, but it may be a requirment from the boiler manufacturers, so if the builder show you the installation instruction for the boiler and it require a dedicated circuit than you must comply, this also applies with reference to supplementary bonding. Major change in BS767:2008 is that throught out the regulation they now state that manufacturer instruction must be complied with, as well as BS7671:2008.
 
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Thanks boys............ 1st job this morning is to read the boiler instructions when i get to site. And something i'll bear in mind for next time.

Don't you just hate it when "non sparks" tell you your job!! I just hope i'm right and he's wrong.

Mark
 
G

greekislandlover

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  • #7
The problem with anything with a motor is that it's a prime candidate for nuisance tripping when the motor gets old and tired (like me). That's the reason a separate circuit is the recommendation to avoid tripping out the freezers/TV in the event of a nuisance trip. We normally put in a dedicated feed to it during a rewire, (more good practice than anything) but this week I might just tag it onto the immersion feed as the isolators are in one dual box.
 
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Shakey

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  • #8
No it not a requirement of BS7671:2008, but it may be a requirment from the boiler manufacturers, so if the builder show you the installation instruction for the boiler and it require a dedicated circuit than you must comply, this also applies with reference to supplementary bonding. Major change in BS767:2008 is that throught out the regulation they now state that manufacturer instruction must be complied with, as well as BS7671:2008.
hhmmm, problem is, I have recently installed a 14kW electric boiler, (yes, on a seperate circuit!) the manufacturers instructions expressely say "must be installed by a NICEIC registered electrician"

Ok, we know thats a crock of poo, but how far do you follow?

And if you had an installation with an alkathene incommer, and you have proved all internal metal pipework is above 22k ohms, but the boiler manufacturer said "all pipework must be bonded", and the boiler instructions make reference to 'live and neutral' and were clearly written by someone who wouldnt know the regs from a basket of pegs, how far do you take it

discuss please:rolleyes:
 
D

DYCHE4230

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  • #9
Especially when a lot of instructions are translations from another language and don't make sense anyway!!!
 
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zupos40

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  • #10
Personally I would bond any pipework associated with the boiler if requested, by the manufacturers instruction, only when the measured insulation resistance was above 250 K ohms, would I not. One would hope it never happened, but if a fault occurred on un bonded pipe work there is a greater risk of electric shock, I do not hold the belief that RCD are the best thing since sliced bread, RCD will not stop you receiving an electric shock, they only reduce the risk of it been fatal, that why BS7671 called it supplementary protection and why it is now know as additional protection, and never to be used as the sole means of protection.
 
W

wayne

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  • #11
i'm still seeing instructions to comply with the 16th edition .the info should read current regs......... i know pendantic but shakey's not even qualified
 
C

CUDABOY

  • Thread Starter Thread Starter
  • #12
hhmmm, problem is, I have recently installed a 14kW electric boiler, (yes, on a seperate circuit!) the manufacturers instructions expressely say "must be installed by a NICEIC registered electrician"

Ok, we know thats a crock of poo, but how far do you follow?

And if you had an installation with an alkathene incommer, and you have proved all internal metal pipework is above 22k ohms, but the boiler manufacturer said "all pipework must be bonded", and the boiler instructions make reference to 'live and neutral' and were clearly written by someone who wouldnt know the regs from a basket of pegs, how far do you take it

discuss please:rolleyes:
yes but did you notify building control of your installation?
 
S

Shakey

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  • #13
yes but did you notify building control of your installation?
why would I need to Nath, i never said it was domestic (it was upstairs by the testing area/classrooms), so Part P doesnt apply

Nathan - 0, Shakey 1:p

i'm still seeing instructions to comply with the 16th edition .the info should read current regs......... i know pendantic but shakey's not even qualified
Wayne - 1, Shakey - 0

you got me there fella!:rolleyes:

Personally I would bond any pipework associated with the boiler if requested, by the manufacturers instruction, only when the measured insulation resistance was above 250 K ohms, would I not. One would hope it never happened, but if a fault occurred on un bonded pipe work there is a greater risk of electric shock, I do not hold the belief that RCD are the best thing since sliced bread, RCD will not stop you receiving an electric shock, they only reduce the risk of it been fatal, that why BS7671 called it supplementary protection and why it is now know as additional protection, and never to be used as the sole means of protection.
w

so when you say you would bond the pipework, what would you bond it too?

just curious, but what do you base your figure of 250k on?:rolleyes:
 
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C

CUDABOY

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  • #14
why would I need to Nath, i never said it was domestic (it was upstairs by the testing area/classrooms), so Part P doesnt apply

Nathan - 0, Shakey 1:p


sorry, i was refering to life in the REAL world. nathan 1, shakey 0
 
S

Shakey

  • Thread Starter Thread Starter
  • #15
why would I need to Nath, i never said it was domestic (it was upstairs by the testing area/classrooms), so Part P doesnt apply

Nathan - 0, Shakey 1:p


sorry, i was refering to life in the REAL world. nathan 1, shakey 0
theres a world outside!!!!!! when did this happen?:confused:

how would you know anyway Nath, you couldnt see through all that ruddy hair

Nathan - 1, Shakey - 1
 
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