how do i remove a MCB unit from mains power box tried pulling it out but it wont budge help !!
MCB unit
- Thread starter boughtonpat
- Start date
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I want to help you but I am concerned that you probably should not be working on a consumer unit. Are you trained in anyway to do so?
Can you tell us why you want to remove an MCB?
Thanks
Also, what make and age is the consumer unit?
its 2 yr old unit installed by local council i have just put in a new 10 watt shower but the 30 amp keeps tripping an electrician had a quick look and told me to replace MCB with a 40 amp
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Is the cable up to it?
1) What size, cross sectional area (CSA) is the cable from consumer unit to shower?
2) Is there an isolator switch either outside the bathroom or in the bathroom as a pull cord switch?
3) Is your new shower 10KWatt as opposed to 10 watt?
Thanks,
1 its 30 amp
2 yes pull cord in place
3 yes 10 kwatt
2 yes pull cord in place
3 yes 10 kwatt
It's a two year old unit, that the council installed?
It has a 30A breaker?
Does not sound right
Are sure it's not 32A MCB?
But we need to know the size of the cable, you can't just go changing the MCB, without being sure the cable can take the current, very dangerous!
It has a 30A breaker?
Does not sound right
Are sure it's not 32A MCB?
But we need to know the size of the cable, you can't just go changing the MCB, without being sure the cable can take the current, very dangerous!
sorry it is 32
An ampere is not a unit of area.
"30 amp" is a measure of current, not physical size.
What size (CSA) is the cable?
See //www.diynot.com/wiki/electrics:flatpvccables.
Edited my previous post, but as BAS has asked as has sparkticus and EFLImpudence
We need to know the size of the cable, you can't just go changing the MCB, without being sure the cable can take the current, very dangerous!
We need to know the size of the cable, you can't just go changing the MCB, without being sure the cable can take the current, very dangerous!
boughtonpat - you should read these:
- //www.diynot.com/wiki/electrics:mcbtocable
- http://www.tlc-direct.co.uk/Book/4.3.1.htm
- http://web.archive.org/web/20080213151445/http://www.kevinboone.com/cableselection_web.pdf
- http://www.tlc-direct.co.uk/Book/4.3.11.htm
- http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html
- http://www.tlc-direct.co.uk/Book/5.3.1.htm
- //www.diynot.com/wiki/electrics:mcb2
- http://www.tlc-direct.co.uk/Book/8.1.1.htm
- //www.diynot.com/wiki/electrics:part-p
Echoing what has already been said - the 32 amp mcb suggests the cable may be too small to feed a 10 kW shower.
Need to know size of cable. You should be aware that cable size is measured by the cross sectional area of the live and neutral conductors, so it could be very hard for you to measure.
Newer cable tends to have the size stamped on it.
Need to know size of cable. You should be aware that cable size is measured by the cross sectional area of the live and neutral conductors, so it could be very hard for you to measure.
Newer cable tends to have the size stamped on it.
Hmm. Lets get out the old Ohms law.
10,000watts/230v = 43.5amps so putting in a 40amp breaker falls at the first hurdle of the cable/current/CPD selection process..
Take the shower back and install one of the same rating as the old one.
PS is there an RCD in the this circuit, anywhere?
10,000watts/230v = 43.5amps so putting in a 40amp breaker falls at the first hurdle of the cable/current/CPD selection process..
Take the shower back and install one of the same rating as the old one.
PS is there an RCD in the this circuit, anywhere?
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