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Discuss dangers on type c for domestic help in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

S

scott g

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im doing inspection on flats and ive came across
all 61900 type c rcbo ive recommended changing to type b
due to type c for inductive loads . could cause overload
what is the general opinon on type c on domestic?
 
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Guest123

  • Thread Starter Thread Starter
  • #3
Hey Scott.

I'm a little confused by your post mate, a C type merely copes better with a high start-up current than a B type, and as it's an RCBO the breaker type isn't really an issue.

I believe wylex and crabtree only make their RCBO's in C type.

Can you elaborate on your "could cause overload" statement please.

Cheers
 
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S

Spudnik

  • Thread Starter Thread Starter
  • #4
I take it you mean 61009?

As long as your Zs is within the lower limits of a type C then i dont see a problem at all.

In fact, some manufacturers dont even make B type RCBO's.
 
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johnnyb

  • Thread Starter Thread Starter
  • #5
We only use C type when we are dealing with machinery or motors, due to the higher start up current being drawn for that split second, not heard of em in domestic situation unless they have made a boo boo.
 
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DanBrown

  • Thread Starter Thread Starter
  • #6
We only use C type when we are dealing with machinery or motors, due to the higher start up current being drawn for that split second, not heard of em in domestic situation unless they have made a boo boo.
Our house has just been rewired by southern electric, with all type c rcbo's and nic'ed... Ther's nothing wrong with type c breakers so-long as the zs is still met..
 
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johnnyb

  • Thread Starter Thread Starter
  • #7
I wonder why they do that Dan, Agree with the zs part, but i would bet that the majority of domestic premises are type b, don,t you think.
 
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DanBrown

  • Thread Starter Thread Starter
  • #8
I wonder why they do that Dan, Agree with the zs part, but i would bet that the majority of domestic premises are type b, don,t you think.
I also agree with you that the majority of domestic are on type b breakers, but really does it matter type b or c?, i don't really think it matters, and as far as a danger - well, i dont think so ...
 
i think for all of us who understand that type c have half the max permitted eli of a type b it doesnt matter, but not everyone realises this and that is where the risk is,( know your max eli and all is well)
 
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johnnyb

  • Thread Starter Thread Starter
  • #10
Never mentioned it was a danger Dan.
 
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Spudnik

  • Thread Starter Thread Starter
  • #11
Chaps,

The MAJORITY of manufacturers do not even make B type RCBO's as there is no real reason to.

The C type covers all installations, provided that the EFLI is within the maximum permitted. (or 80% corrected)
 
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johnnyb

  • Thread Starter Thread Starter
  • #12
Sorry boys i was just on about normal type breakers, not rcbo,s.
 
M

maddfridge

  • Thread Starter Thread Starter
  • #15
We only use C type when we are dealing with machinery or motors, due to the higher start up current being drawn for that split second, not heard of em in domestic situation unless they have made a boo boo.
hi there

type c are used a lot in some lighting appilcations such as display lighting, air con etc but they are also used to give a bit more before all the lovely 3 kw fan heaters are connected in the office when the heating breaksdown lol:rolleyes:

cheers
 
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