Discuss BS 3036 fuses not allowed for new circuits!! in the UK Electrical Forum area at ElectriciansForums.net
Surely new circuits have to be rcd protected
Surely new circuits have to be rcd protected
You only need six characters to post a reply so you wasted one there.Really?
you only need six characters to post a reply so you wasted one there.
Seriously though, please offer up advice or opinion rather than one line answers.
Ok... so does anyone have any idea if what he is saying is correct?
Is it ok to connect up a new circuit to a BS3036? This is in relation to the 0.4s disconnection times, i.e the assessor says it does not meet them?
My answer was that it depends on the Zs as to whether the BS3036 would disconnect in time, but the assessor did not accept this.
until some complete moron of a customer fits a nail in.You can use any protective device so long as you meet the disconnection times. BS3036 fuses are still listed in BS7671 so as long as the measurements and calculations work out, they are fine.
In the new 3rd edition/cash cow if you added a circuit to this CU would have to add a RCD or do it surface glav or in glav in the fabric of the building or more than 50mm deep in the building. And this is the best in a building with an electrically skilled person you have to do a risk assessment to say, why you deem it safe not to have a RCD.[/QUOTE]
2nd bit in bold that's just for a socket outlet without RCD protection and if the installation requires RCD protection then you would have to put it on a RCD anyway.
And the 1st bit in bold you should already be doing this anyway but doesn't have to be galv when surface.
This is what my assessor has told me!
He states that the BS3036 does not meet the 0.4s disconnection times and cannot be used for any new work.
I do not have a BRB so cannot see the disconnection times for a 3036.
Surely he is wrong? He is suggesting that we have to change the 3036 if we want to carry out any work.
Bit cross... I did not like him at all.. different bloke to last time!
.....
sorry, I do have the disconnection times for 3036 in the BGB...but surely it's dependent on the Zs?
One thing I would say is that if you are going to extend a circuit protected by a BS 3036 fuse then the correction factor of .725 would have to be applied to this circuit . the only thing I would do is to use a fused spur to feed an additional point or RCD fused spur if required ...
Late to the debate, but totally agree with the consensus, the assessor is wrong. As has been stated, if the circuit Zs falls below the adjusted max Zs value (0.87 for 30 amp, iirc), your good to go.
Oh, and ask him which Reg he is using to justify his comments.
Jesus glad I'm not one of your client using a Regs book which as been out of date for 3 years
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