3036 with RCD

[kant]

Can any one tell me if i need to put rcd on 3036 cu if I am just changing socket faces cause i was told i did?

 

[IQ Electrical]

I use these figures, I think from a BS7671 appendix

Fuses Short circuit capacity of BS3036

5A - 1kA
15 - 30 2kA

 

[Des 56]

Any fuse below 30 amp will be rated at either 1 or 2 KA S1A or S2A
The 4KA will be 30 up to 100 amp S4A


S1A can also be up to 60 amp
S2A up to 100 amp

 

[jibjob]

First photo shows main earth attached to incomer with bonding clamp, reckon that's a code 2 on PIR

 

[IQ Electrical]

First photo shows main earth attached to incomer with bonding clamp, reckon that's a code 2 on PIR

That's the DNO cable and connection, it isn't covered by BS7671

 

[jibjob]

I thought BS7671 covered all things electrical. It maybe their responsibility to put it right but surely the person carrying out the PIR has a responsibilty to point it out.

 

[IQ Electrical]

If the Ze reading was unacceptable then you'd rightly list it as a defect.

 

[pushrod]

Yep seen that, heard you loud and clear..

But i dont think i have a 1361 main fuse..

and i always see this ka rating 1 to 4 on 3036 fuses but which is it... 1,2,3 or 4?

Have a careful look on the fuse holder and you might just be lucky and see S1A, or S2A on it. 1 means a breaking capacity of 1kA and 2 is for a BC of 2kA. unfortunately a lot of them have nothing but dead spiders in them!

If you have a type 1 bs1361 main fuse you can use its BC of 16.5kA (type 2 is 33kA) , but if it is a BS 88-6 their BC is also 16.5kA

If you come across the old bs 3871 circuit breakers it is the "M" number on the side that tells you the BC eg M3 is a BC of 3kA.


edit ; should have said that you can only rely on the upstram fuse if the CU is to BS 5486-13 or BSEN60439-3 and with your missing cover if it was to the BS standard it won't be now.

However in this http://www.esc.org.uk/pdfs/business-and-community/SwitchedOn-Issue-17.pdf from the ESC (page18?) it says that the BC of 3036s in domestic use was the 2kA versions . Which would mean with your pfc you are ok

 

[Dolph Lundgren]

Providing earth loop complies with 41B1 in BS 7671 then you don't need an RCCD.

 

[IQ Electrical]

Providing earth loop complies with 41B1 in BS 7671 then you don't need an RCCD.

He's carrying out a PIR so if cables are buried in Walls at depths of less than 50mm etc etc then of course there should be(and is) 30mA rcd protection!

 

[Dolph Lundgren]

Do cables buried at less than 50mm on a PIR mean an RCD should be present. Not sure it does. Otherwise 90 % of DBs in UK would need replacing. Sockets should always have an RCD but lack of them on a PIR does not constitute a code 1 unless external sockets lack RCD protection.

 

[IQ Electrical]

Do cables buried at less than 50mm on a PIR mean an RCD should be present. Not sure it does. Otherwise 90 % of DBs in UK would need replacing. Sockets should always have an RCD but lack of them on a PIR does not constitute a code 1 unless external sockets lack RCD protection.

Dolph, do you have a 17th edition qualification?

Cables buried at depths of less than 50mm without earthed metallic sheaths etc. should always be a code 4 on a PIR!

Of course the DB would not need to be replaced!

Lack of rcd protection to sockets not expected to supply equipment outdoors would be a code 4 and a code 2 if outdoor equipment was expected to be supplied.

It is really important to get basic regulation information right before posting advice.

Have a read of this: http://www.esc.org.uk/pdfs/business-and-community/electrical-industry/BPG4_08.pdf it should be of some assistance.

 

[Dolph Lundgren]

Think we may have wires crossed, I was simply stating that a DB would would not need replacing with the 50mm reg etc etc. You'd be surprised how many sparkys think it does!


Yes I do have a 17th ed qualification, but thanks for the link anyway.

Codes regarding socket outlets will be altering next year when the new EICR will be launched replacing PIRs. But that's for another day I guess.

And as regards correct info is'nt that the point of a forum. To learn and share ideas?


By the way my latest film 'The Expendables' is out 2 weeks today on DVD and Blu - Ray.