Can an Earth wire block (4 way) be screwed directly to the side of a first floor joist under the floor boards or does it need to be first placed in a protective box.
Earth wire connection blocks
- Thread starter gardener1214388
- Start date
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Ans YES
Closest place to connect earth wire is under studded partition wall and next door under the landing floor into a 4 way earth block i.e. 3 earths into one side, one earth out into a junction box and not to the consumer unit. bonding of pipes and metal work only.
It should be accessible for inspection.
Why can you not use one of the bonded parts as the junction?
Connect to what?
Why can you not use one of the bonded parts as the junction?
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kai
Why can't you mount in a 40mm deep double socket box, with a double way blank plate on top? (Labelled as Earth Bonding Terminals on the cover).
If it is possible to get all the conductors to a single point then a junction (box) isn't necessary, is it?
I suspect the correct method of bonding is not being implemented.
I suspect the correct method of bonding is not being implemented.
The electric shower will be earthed to the cold water pipe and the 16mm shower grey twin and earth taken back directly to the consumer board with its own 30ma breaker when the new one is installed.
The basin, pan, bidet H & C water as fitted as required to each and C.H & radiator copper pipes all have under earth tags fitted and that cable is then routed under the studded partition into the landing floor under the T&G flooring where there are only two existing circular junction boxes seen. There are in total three bathrooms each Earth bonded and hence there are three independent Earth cables routed the same into the landing floor so connecting three cables into one 4 way block then allows another single earth wire to be connected to one of the junction box Earth terminals. I understand that such Earth cables must not be taken back direct to a consumer box.
No it won't - that's not earthing.
But why there?
Why not simply connect them together where they are?
If you use screwed connections they have to be accessible.
But why? Why connect all the bathrooms together? Why take the bonding (not earthing) conductors out of each bathroom in the first place?
Why do you want to connect the bonding cables to one of those?
Earthing conductors must be.
Bonding ones don't need to be.
A - So Supplimentary earth wires only connect metalwork in a bathroom connected to say metal pipework without any termination into say any junction boxes as all other electrical equipment like shaver sockets, light fittings, electrical towel rails each are earthed via their own usually flat grey twin and Earth cables into and earth cable that terminates at the consumer board ?
To summarise, please correct me as required.
1 - To connect all metalwork In a bath/shower room requires a minimum 4mm earth cable via tags to be fitted for each product connection e g metal pipe....installed but do NOT need to be connected into any power circuit/earth connection box.
2 - All electrical products will have their own usually twin and earth cable connections to be connected into a power circuit that has its own earth connection assuming that it is not double insulated then no earth connection is necessary.
3 - so where is it necessary if needed for and Earth wire to be finally take back into the nearest power circuit earth terminal or does that not apply at all
Thanks for your excellent feedback
3 -
Firstly, do you have RCD protection on ALL the circuits which supply the bathrooms?
Meanwhile:
Supplementary Bonding should connect together (bond) the simultaneously accessible
exposed-conductive-parts (touchable metal parts of Class I fittings) and
extraneous-conductive-parts (touchable metal pipes etc. which ARE extraneous-c-ps; not those which aren't) of the location (bathroom).
Connections may be made anywhere which results in a low enough impedance between the parts concerned.
Supplementary Bonding should connect together (bond) the simultaneously accessible
exposed-conductive-parts (touchable metal parts of Class I fittings) and
extraneous-conductive-parts (touchable metal pipes etc. which ARE extraneous-c-ps; not those which aren't) of the location (bathroom).
Connections may be made anywhere which results in a low enough impedance between the parts concerned.
I don't really understand what you mean/are trying to say there. And it doesn't seem like a response to all the questions I asked and points I raised.
Supplementary equipotential bonding connects together the cpcs of appliances in the bathroom zones and extraneous-conductive-parts.
- Not all metalwork - only that which is an exposed-conductive-part. You would not bond, for example, a coat hook, or a toothbrush rack.
- Connection must be made to the protective conductors of appliances in the Zones.
The circuit protective conductors still need to be connected to the bonding.
Supplementary equipotential bonding connects together extraneous-conductive-parts and the cpcs of appliances in the bathroom zones not just randomly connected to a nearby junction box that may hot have anything to do with the circuits in the bathroom.
Are you installing supplementary bonding because you know it is required, i.e. because you know that in your installation the following conditions are not met:
(i) all final circuits of the location comply with the requirements for automatic disconnection in accordance with 411.3.2;
(ii) all final circuits of the location have additional protection by means of an RCD in accordance with 701.411.3.3; and
(iii) all extraneous-conductive-parts of the location are effectively connected to the protective equipotential bonding in accordance with 411.3.1.2.
(ii) all final circuits of the location have additional protection by means of an RCD in accordance with 701.411.3.3; and
(iii) all extraneous-conductive-parts of the location are effectively connected to the protective equipotential bonding in accordance with 411.3.1.2.
or because you just think it is? Because it might not be.
http://electrical.theiet.org/wiring-matters/53/section-701/index.cfm
https://www.google.co.uk/search?q=701.415.2
A - YES
Thank you for your greatly appreciated advice you have answered my questions.
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