plastic/copper hybrid
- Thread starter mackeral
- Start date
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You're screwed mate. Worst possible setup. An iffy connection is worse than either a good connection or a definite insulator.
But strictly (I think!) all you need to do is bond every piece of metal entering the bathroom, at the point where it enters. You absolutely can not rely upon the plastic jointed pipework to form part of the bonding. But it is the entry points to the equipotential zone that are important.
But strictly (I think!) all you need to do is bond every piece of metal entering the bathroom, at the point where it enters. You absolutely can not rely upon the plastic jointed pipework to form part of the bonding. But it is the entry points to the equipotential zone that are important.
B
Big_Spark
Mackeral, whilst pure water may be an insulator, the water in your pipes is not and will conduct any fault currents.
You may better off replacing the plastic connections for brass compression fittings or copper push fit, that will look neater and also reduce the amount of cable hanging around the bathroom.
You may better off replacing the plastic connections for brass compression fittings or copper push fit, that will look neater and also reduce the amount of cable hanging around the bathroom.
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B
Big_Spark
Why can you not replace the fittings?
Having asked that, then the only course of action is to bond across each and every joint and ensure that you have a guaranteed Earth path. As you have plastic couplers, then I would recommend that you take an Earth bond from the bathroom back to the Consumer Unit Earth Terminal. That is the only way you will be confident that you have a full path to earth.
Having asked that, then the only course of action is to bond across each and every joint and ensure that you have a guaranteed Earth path. As you have plastic couplers, then I would recommend that you take an Earth bond from the bathroom back to the Consumer Unit Earth Terminal. That is the only way you will be confident that you have a full path to earth.
Here we have a difference of opinion. It is not necessary to bond to metal taps which are connected by those flexible plastic pipes to copper supplies. Exactly the same reasoning applies to pieces of copper pipe separated by plastic joints. Equipotential bonding does not require you to bond every single piece of metal. Only those which can introduce a potential from outside. So if you bond a pipe just where it comes into the room, then you prevent any voltage being introduced further along. Doesn't matter how many plastic breaks there are.
But if the pipes are solid metal, you can use them as part of the bonding circuit. so you can connect to one end of a pipe, and from the opposite end maybe to a light fitting. Makes life more difficult if you have to use extra wiring instead.
Now wait for the disagreement.
But if the pipes are solid metal, you can use them as part of the bonding circuit. so you can connect to one end of a pipe, and from the opposite end maybe to a light fitting. Makes life more difficult if you have to use extra wiring instead.
Now wait for the disagreement.
B
Big_Spark
Damocles, you are correct that not every piece of metal requires bonding, however in this situation the pipes do require bonding. It is not relevent whether you or I consider this OTT, I personally do, it is a requirement.
Talked to the NIC (after 5 min hold on an 0870 number) and they say that it is unlikely that supplementary bonding is required in this scenario. But to prove it with a test instrument to keep myself right - If the reading is over 22,000 ohms then its ok. Also to disregard water as a conductor.
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