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Can you let me know what size mcb is required for this unit

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  • Robert Horton
    Robert Horton Sep 06, 2010

    Hi tell me what MCB stands for and I can tell you. Thanks,
    Shastalaker7

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  • Master
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Hi, if you mean main circuit breaker, look on the condenser unit outside and it will tell you on the data plate what the rated amperage is for the unit, minimum and maximum. This will tell you this size you should go with, very easy. It will tell you not to exceed so many amps for instance 35 amps maximum. Go with a double pole 30 to 35 amp breaker and at the disconnect box, the same with cartridge fuses if it has them. Please do not forget to rate me on this as I know you will be king. Please keep me posted and I will check in on you as I keep records on you and all of the people I have helped
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor.

Posted on Sep 06, 2010

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The fuse in the plug is too low / high in the plug, as the Air con, requires more power on start up,

it is also worth checking the plug is wired correctly E N Live etc..

or the MBC is too low, normally sockets are 16 amp - if its lower check with a qualified electrician it will be noted on the MCB denoted sockets

if the air con is portable, or able to be plugged in else where try upstairs sockets or kitchen sockets as these should be on a different circuit - if it does trip on these the air con is faulty and dump or see if a qualified repair agent is local

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Some electrical knowledge would be helpful, check each element seperatly, you may have to carefuly disconect each heater on the hob, unless you know which blows the mcb, check all connectings to see thay are secure, work round the hab reostates, make sure there is no shorts to ground from elements, with temp control down at zero. Check wiring into mains as a loose connection will cause heat and mcb to trip.
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Rate it.

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