New MCB will not re-set

[PrenticeBoyofDerry]

It turned out to be a blown 30amp old cylinder type fuse in the old fuse box. We thoiught that the new 45 amp
RCB/MCB fitted was going straight to the shower unit but apparently that was not the case.

Sounds like a fudge up!

 

[Echo the husky]

Could the 45A part just be the maximum rating of the RCD unit? The fuse being the overcurrent protection? It would still be nice to see some photos and the KW rating of the shower!

 

[PrenticeBoyofDerry]

Are RCDs/RCCBs rated at 45A?
I would suspect that the original shower circuit was protected by a 30A fused Isolator, and the lazy git who put new shower in decided to use existing circuit and tie in the RCD and 45A MCB to that circuit/fuse/iso.
I would like to see the cert issued!

 

[kai]

It could have been a 7.2.kW economy shower, and the cartridge fuse was on the feed to the MCB, because the breaker was only M6 rated, and the PSCC was more than that, hence the need for a Cartridge Fuse. Consumer unit manufacturers do state that their devices need backing up with a suitable cartridge fuse, in the case of Higher PSCC being encountered.

 

[securespark]

Go easy chaps I am and old lady !

You're only as old as you feel.

And I feel 78, despite being 49!

 

[ban-all-sheds]

Are RCDs/RCCBs rated at 45A?

Don't see why not.

 

[JohnW2]

Are RCDs/RCCBs rated at 45A?

Don't see why not.

Nor do I. However, I presume the question was asking whether there are actually (m)any RCDs out there which are rated at 45A. If there are, they certainly aren't common, and I cannot personally recall ever having seen one. The difference from a (common) 63A one would presumably be so small (and the market probably small) that most manufacturers probably don't feel it would be worthwhile making them.

Kind Regards, John

 

[bernardgreen]

very inappropriate content by Midas Man has been removed.

At least it is only Midas Man and not King Midas giving us this advice.

Midas found that when he touched his daughter, she turned to gold as well. Now, Midas hated the gift he had coveted.

 

[PrenticeBoyofDerry]

Are RCDs/RCCBs rated at 45A?

Don't see why not.

Never fitted, seen or heard of RCDs or RCCBs with this designated rating, have you?

I know you can get RCBOs at 45A but not the above.

 

[ban-all-sheds]

Never fitted, seen or heard of RCDs or RCCBs with this designated rating, have you?

No, but since you can get 25A and 40A ones, I don't see why there should be no such thing as a 45A one.

 

[securespark]

Here's an odd one:

http://www.ebay.co.uk/itm/LEGRAND-B...OR-RCD-RCCB-250V-2-POLE-0710002-/151965170176

500mA: 15-45A