Rcd as main main switch?

[whazza22]

Just a quick one.

Is it acceptable to have a 63a 30ma Rcd as a main switch?

Can't see why not but just thought I would see what others say?

 

[Octopus]

Couldn't agree with you more!! Let's move on. :83:

I couldn't disagree more with you.

If the installation is new, or a replacement CU then a single RCD DOES NOT comply with BS7671. A small flat with 3 circuits should have an RCBO for each circuit.

 

[dazzer-b]

I couldn't disagree more with you.

If the installation is new, or a replacement CU then a single RCD DOES NOT comply with BS7671. A small flat with 3 circuits should have an RCBO for each circuit.

oh well.... im sure you'll sleep at night

 

[baldyphil]

Just to hurl another moggy in... so the general consensus is that using an RCCB as a main switch is not considered good practice due to the 'convenience factor' meaning it doesn't meet the minimum split load requirements of the 17th, but... how about a household with 16 circuits split equally over 2 separate crabtree boards - one board uses 80A RCCB as main switch whilst the other has a 100A DP as main switch and no RCD protection (this isn't hypothetical, btw, but characteristics of a property I worked at recently). If the 100A DP was swapped for an RCCB (80A would easily meet the everyday requirements of the board), would this be deemed good practice as it would effectively give the same level of protection and convenience as an upgrade to a split load 16-way board at a fraction of the cost to the client? Apologies for the verbal diaorrhea...:smiley2:

 

[GLENNSPARK]

Just to hurl another moggy in... so the general consensus is that using an RCCB as a main switch is not considered good practice due to the 'convenience factor' meaning it doesn't meet the minimum split load requirements of the 17th, but... how about a household with 16 circuits split equally over 2 separate crabtree boards - one board uses 80A RCCB as main switch whilst the other has a 100A DP as main switch and no RCD protection (this isn't hypothetical, btw, but characteristics of a property I worked at recently). If the 100A DP was swapped for an RCCB (80A would easily meet the everyday requirements of the board), would this be deemed good practice as it would effectively give the same level of protection and convenience as an upgrade to a split load 16-way board at a fraction of the cost to the client? Apologies for the verbal diaorrhea...:smiley2:

eh?....
try safety...as in you don`t want all the lighting to stop working...should the RCD let go...
and whilst were at it...ever heard of accumilated earth leakage....
split final circuits up as evenly as possible between 2 RCDs...or each final with its own (RCBOs)
think before posting nonsense will you

 

[Engineer54]

Why would you use a 100mA s type as the main switch as opposed to just a main switch?

This only makes sense in a TT installation, where the up front S type RCB is providing back-up protection on failure of the 30mA RCD(s). Not much point on a TN system, .....that'll be giving you 3 levels of protection!! lol!!

 

[dazzer-b]

Just to hurl another moggy in... so the general consensus is that using an RCCB as a main switch is not considered good practice due to the 'convenience factor' meaning it doesn't meet the minimum split load requirements of the 17th, but... how about a household with 16 circuits split equally over 2 separate crabtree boards - one board uses 80A RCCB as main switch whilst the other has a 100A DP as main switch and no RCD protection (this isn't hypothetical, btw, but characteristics of a property I worked at recently). If the 100A DP was swapped for an RCCB (80A would easily meet the everyday requirements of the board), would this be deemed good practice as it would effectively give the same level of protection and convenience as an upgrade to a split load 16-way board at a fraction of the cost to the client? Apologies for the verbal diaorrhea...:smiley2:

ive installed a 15 way split load DB on numerous occasions, you only have 1 more way. ok i did have the option of splitting up the lighting circuits and rings.

i say go ahead there are a lot of busy people on this site that get their tears out and find something negative with every post.