Consumer and breaker options

[dingbat]

But you would never recommend Type Cs for standard domestic circuits. And discrimination hardly ever comes into it.

 

[Spark123]

Like I said, in most instances a type B is adequate, there are reasons for installing type C though, I wouldn't say I'd never recommend type C.

 

[RMS]

Have to agree with Spark123,

as long as the designer can ensure that disconnection times can be satisfied then i see no problem in using a C type fuse for a domestic environment.

 

[dingbat]

The OP said this:

Also I have been recommended to use C type breakers but most of the offers with complete units are offering B type.

The only circuits you might normally consider using Type Cs on in a domestic would be the lighting. The type of loads on almost all other circuits are adequately protected by Type Bs and it is rare to suffer any nuisance tripping.

Whether you, as a qualified professional may decide to use Cs on individual circuits is entirely up to you, but you would not, I hope, arbitrarily suggest to anybody that they should go out and buy a CU with a set of C-type breakers. Type Bs are supplied because Bs are the recommended type for domestic circuits. Furthermore, many wholesalers don't even stock a full range of type C breakers.

 

[dingbat]

C type fuse

Oh, please!

 

[Spark123]

I wouldn't suggest to anybody that they should go out and buy a CU when they do not have the sufficient knowledge to carry out the work. Type B may be more common in domestic, but I still wouldn't preclude using type C breakers on this basis. If my local wholesaler doesn't have one in stock they can get it next day.

 

[RMS]

C type fuse

Oh, please!

MCB,

sorry getting a bit carried away there.

 

[ban-all-sheds]

The OP said this:

Also I have been recommended to use C type breakers but most of the offers with complete units are offering B type.

The only circuits you might normally consider using Type Cs on in a domestic would be the lighting. The type of loads on almost all other circuits are adequately protected by Type Bs and it is rare to suffer any nuisance tripping.

Aircon?

Fridge/freezer?

 

[securespark]

Crabtree and Wylex RCBO's (IIRC) are all C's....

 

[RF Lighting]

The OP said this:

Also I have been recommended to use C type breakers but most of the offers with complete units are offering B type.

The only circuits you might normally consider using Type Cs on in a domestic would be the lighting. The type of loads on almost all other circuits are adequately protected by Type Bs and it is rare to suffer any nuisance tripping.

Aircon?

Fridge/freezer?

Welder.

I have one in my garage, which tripped the type B breaker the socket used to be fed on.

(or is this treading into type D teritory?)

 

[Adam_151]

Submains?

16A S/O radial circuits that may supply equipment with SMPS in and where the impedance of the supply is low?

 

[securespark]

Well, I'm sorry, RF, I have to better you. I have an X-ray unit in my shed, and it's connected up with a type D. Beat that, kid!!

 

[JohnD]

When I retired from the Brinks-MAT warehouse at Heathrow, I had a small smelting furnace in the garage, no fuse or MCB, straight off the incomer.

 

[RF Lighting]

I recon the X-ray machine is still in the lead

 

[Pensdown]

When I retired from the Brinks-MAT warehouse at Heathrow, I had a small smelting furnace in the garage, no fuse or MCB, straight off the incomer.

I was building a new shed for my welder and x-ray machine so I borrowed a 200ft tower crane from work. The incomer was to small so I had to feed it directly from the sub station outside my house, no fuse, mcb or incomer.