I have a situation where I have fitted an RCD incomer consumer unit alongside another existing RCD incomer unit to provide RCD protection for remaining circuits. I didn't fit an isolator for the two units so to turn off all power to the building you have to turn off both RCDs. I know there was a thread on here a few weeks ago about whether or not this is compliant and somone (I forget who, sorry!) posted a link to a NAPIT document that advised that this is compliant as the consumer units with their associated circuits can be regarded as separate installations. Anyway the customer now wants me to refit the old main switch from the previous MEM 3 unit I replaced (impractical and bad idea for so many reasons) in order to provide a single point of isolation (to paraphrase!). I'd like to offer to fit a new isolator (I even have a few nocking around), but I can't find an amendment 3 2-module enclosure for sale anywhere, or indeed an amendment 3 100A DP isolator - they all seem to be plastic. Anyone know of any?
You want a metal enclosure with din rail and door - will this work?
British General 5-Module 3-Way Populated Garage Consumer Unit - http://www.screwfix.com/p/british-general-5-module-3-way-populated-garage-consumer-unit/1926g
British General 5-Module 3-Way Populated Garage Consumer Unit - http://www.screwfix.com/p/british-general-5-module-3-way-populated-garage-consumer-unit/1926g
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Try the Wylex DSF100M which also incorporates a 100A fuse. They also do an 80A version DSF80M.
Quoted for one of these Europa Components MEC4T 4 Module Metal Enclosure with lid (tails) IP40 - https://www.electricalcounter.co.uk/products/Consumer+Units/Europa+Circuit+Protection/Enclosures/4+Module+Metal+Enclosure+with+lid+%28tails%29+IP40/3142604240 in the end, though not sure if he'll go for it. Amazing how cost adds up with enclosure, switch and tails!
Thanks again folks!
Thanks again folks!
L
Leesparkykent
no they don't work to bs7671 plus there is argument that a double pole switch doesn't fall foul of 421.1.201. I would seek clarify from your CPS on this though.
W
Wilko
FWIW - In general conversation with Assessor - plastic may be ok in a meter box that is in/on an external wall facing out, but it's not ok if used inside. This implied (to me) Assessor considered it to be affected by the full metal jacket reg.
Any din rail mounted isolator will fit a standard DIN rail they are all designed to align at the same height, the problem comes when you want the terminals to align with a busbar, since you have tails to fit there should be no problem.
Since you have the four module enclosure you could even fuse it down with a fuse carrier as well! (Though I do not see any point in doing that)
Since you have the four module enclosure you could even fuse it down with a fuse carrier as well! (Though I do not see any point in doing that)
Thought as much but wanted to be sure
. Thanks for confirming!Yes no need - smallest tails present are 16mm2 and the cutout is 60A. I would have bought a two module but they just have 20mm knockouts - no good for tails!
You can cut bigger holes but the space is tight for forming the tails in a two module enclosure even with a 32mm gland.
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