bonding

[rob.allen3000]

Can anyone help? Is a metal kitchen sink considered a extraneous conductive part when it's fed by plastic pipes?

 

[Engineer54]

but if the metal sink has electrical conductivity to the metal waste, then the sink itself becomes extraneous.

Which is exactly what will have here on many of our dormitory kitchens and the like. All will be tested and where neccessary, appropriately bonded!!

 

[Deleted member 9648]

but if the metal sink has electrical conductivity to the metal waste, then the sink itself becomes extraneous.

Which is exactly what will have here on many of our dormitory kitchens and the like. All will be tested and where neccessary, appropriately bonded!!

But it's the pipe which is intoducing the earth potential ,not the sink....so it is the pipe which should be bonded.

 

[telectrix]

absolutely correct, WP.

 

[scotsparky]

Which regulation are you referring to here?

Not quoting regs. The Op asked is a metal sink should be bonded. Simple answer is on most occations No
However if the sink contains equipment such as "heating elements, Glass washers ect" or as has been pointed out metal waste then it has to

 

[Deleted member 9648]

Not quoting regs. The Op asked is a metal sink should be bonded. Simple answer is on most occations No
However if the sink contains equipment such as "heating elements, Glass washers ect" or as has been pointed out metal waste then it has to

Sorry to be picky here but it's this sort of thing which feeds the never ending confusion over bonding.

1. Regardless of a metal waste or pipes a sink will not require bonding,it is the pipes that are ECP's and the pipes that require bonding.
2. If a sink is part of an electrical appliance it may require earthing.....NOT bonding,there is a difference.
3. As I've already stated,the only circumstance I can think of where a sink may require bonding is if it if fixed to hidden structural steel.

 

[Engineer54]

But it's the pipe which is intoducing the earth potential ,not the sink....so it is the pipe which should be bonded.

Know what your saying here Wirepuller, but sometimes, in fact quite often there isn't much space or available pipe to bond too. The other thing is the dreaded plumber comes along to work on a blocked waste or whatever and removes the bond and doesn't bother replacing it!! So more than often, it's wiser to connect the bonding conductor to the dedicated bonding point on the sink.. lol!!

 

[Deleted member 9648]

Know what your saying here Wirepuller, but sometimes, in fact quite often there isn't much space or available pipe to bond too...In which case the part which actually needs bonding,namely the pipe....may not be bonded The other thing is the dreaded plumber comes along to work on a blocked waste or whatever and removes the bond and doesn't bother replacing it!! So will the dreaded plumber be more likely to repace the bond to a sink if he has cause to remove it?....what the plumber does is his lookout,but the fact remains the bond should be on the pipe,not the sink.So more than often, it's wiser to connect the bonding conductor to the dedicated bonding point on the sink..Replace wiser with easier and I'd be with you....dont make it right though lol!!

Still being picky I'm afraid.....but I disagree with some of the information posted in this thread,and as I've already stated it's this sort of mis-information which has resulted in the confusion over bonding.
Once again...the only circumstances I can see where a sink may require bonding is if it is fixed to extraneous steel within the fabric of a building.

 

[Engineer54]

Still being picky I'm afraid.....but I disagree with some of the information posted in this thread,and as I've already stated it's this sort of mis-information which has resulted in the confusion over bonding.
Once again...the only circumstances I can see where a sink may require bonding is if it is fixed to extraneous steel within the fabric of a building.

Not at all, ...being picky is far better than being confused in my book!! lol!!