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Thread: MCB rating
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12-06-2005, 07:31 AM #1
MCB rating
hi guys,
anyone know whats the reading mean on the MCB(Eg: B6.B16,B20,B32) mean? And some of the alphabet start with A6 and other start with c....which one should i choose for a A/c unit ...9000btu...?? thank very mch for those who reply for my curiousity
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12-06-2005, 07:56 AM #2
Re: MCB rating
6/16/20/32 relates to the current rating of the c/b
a.b.c.d relates to the inrush trip caracteristics of the fuse
http://www.tlc-direct.co.uk/Technica...bution/Mcb.htm
a 230v 9k split -unless inverter- I would use D16 or C16
cheers
richard
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12-06-2005, 08:13 AM #3
Re: MCB rating
tks richard! this really help for new technician like me..
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12-06-2005, 11:02 AM #4
Re: MCB rating
did you follow the link?
"In some cases such even these MCBs may not be sufficient when Compressor motors are used and a type D MCB may be necessary. However, caution should be practised because the characteristics for these MCBs may make compliance with the Wiring Regulation difficult without a change in the specifications of the other equipment. "
chers
richard
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12-06-2005, 09:03 PM #5
Re: MCB rating
Richard,
I have found a type " C " suitable .
On an install last week, the sparky failed to turn up, I couldnt hang around so connected the system to the main consumer unit.
It was crabtree............there was one spare fuseway, so I went round all the wholesalers looking for a 32Amp Type C , Crabtree breaker.
No luck,, it was an old obsolete type. all they could offer was a Wylex type with a similar fitting size.
It was type B............I had to take the chance............I bought it and fitted it.
Unit started up and is running ok.............
I have ordered a type C............but am struggling to get one....
Just hope this Type B, performs in the interimAny opinions, statements and facts expressed in this message do not constitute legal advice in any shape or form and is given for a general outlook in nature. You are advised to seek appropriate and specific professional assistance from a regulated and authorised advisor for definitive advice.
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13-06-2005, 11:30 AM #6
Re: MCB rating
in singapore ...the supply voltage here is between 220v~240v...what about u guys here??i knew some of them uses 110v and i dont understand why they dont want it to be standardise throughtout the world...?
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