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Topic Title: Main switch
Topic Summary: What type ?
Created On: 09 December 2013 07:44 PM
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 09 December 2013 07:44 PM
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ady1

Posts: 766
Joined: 19 April 2005

Hi
I've been writing AC22A for type, when others leave it blank on an EICR - What do you do ?

Regards
Ady

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 09 December 2013 07:52 PM
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alanblaby

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BS-60947-3 usually for newish domestics.
 09 December 2013 08:39 PM
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ady1

Posts: 766
Joined: 19 April 2005

I put that into my BS number box

Regards
Ady

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 10 December 2013 12:29 PM
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OMS

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OK - if you use BS EN 60947 - 3, then the type (as covered by the standard) would be Switches, disconnectors, switch-disconnectors and fuse-combination units - depending on what you have installed.

Switch

Load making and breaking capability

disconnector

Usually non load making or breaking

Switch Disconnector

A combination of the above - typicaly what you find at the front end of a consumer unit

Fuse Combination Unit

Either single or double break in each pole and contains a fuse in combination with either a switch or a disconnector or a switch disconnector

AC22A is just an utilization category for the performance in terms of type of load and number of switching operations.


Regards

OMS

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 10 December 2013 02:01 PM
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weirdbeard

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I don't know if the forms you use are different, but on the model EICR forms there isn't any mention of 'type' in the Main switch section.
 11 December 2013 06:33 PM
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ady1

Posts: 766
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Elecsa's EIC pads.
Now you see why i'm asking....
OMS - Type of load - AC22A still favourite for me ??

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 11 December 2013 07:03 PM
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OMS

Posts: 19688
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Originally posted by: ady1

Elecsa's EIC pads.

Now you see why i'm asking....

OMS - Type of load - AC22A still favourite for me ??


Do you want the type of main switch or the type of load ?

As I said, AC22A is just an utilization category for frequent switching of of mixed resistive and inductive loads, including moderate overloads - it places demands on the switch to be able to operate with power factor not worse than 0.65 and the switch to be able to operate at 3 x In

Is it credible your switch needs to operate 600 close/open cycles per hour maximum - be lucky to do that in its lifetime I would have thought, let alone an hour.



Regards

OMS

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 11 December 2013 07:08 PM
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daveparry1

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The title was "main switch, what type" so why has what type of load come into the post? Main switch type BS60947-3 is the usual type in domestic c/units,

Dave.
 11 December 2013 07:38 PM
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OMS

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Ady - Looking at what I think is an Elecsa EICR, it doesn't ask for Device or Load type under the main switch details

It does ask for type in relation to the Supply protective device

Under main switch, if not an RCD, it requires:

Location..................................................................
BS (EN) ...............................................................
No. of poles..........................................................
Current rating .................................................... A
Fuse / device rating or setting ..........................A
Voltage rating .................................................... V

What actually is the question you are asking ?

Regards

OMS

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 11 December 2013 07:42 PM
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ady1

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Blimey - didn't think this would cause so much confusion.
Surely loads of you are with ELECSA and have their EIC pads.
Under the heading main switch its BS number, type ???, No of poles, voltage etc etc
I used to leave it blank, but recently have been putting down AC22A. My annual is on Friday - I guess I can just ask him.
Many thanks
Ady

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 11 December 2013 07:49 PM
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daveparry1

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BS60947-3 Ady. niceic ask that question on EIC's and that's how I've been answering it for the past 7 years or so without comment at assessment times!
Good luck with the annual,

Dave.
 11 December 2013 08:26 PM
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OMS

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Under the heading main switch its BS number, type ???, No of poles, voltage etc etc


OK - then my first response is probably what you need

If you have a device to BS EN 60947-3 (ie a typical domestic consumer unit main switch), then it will be a switch disconnector - ie a device that is both load making and load breaking and suitable for isolation.

Let us know what your assessor says though

Regards

OMS

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 11 December 2013 10:04 PM
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ady1

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Hi
It's obviously raised a few eyebrows....
As you guys have taken the time to answer my post - I have been to the van and will list exactly what its says on my 'Electrical Installation Certificate' pad. What i put down usually is in brackets ()
Particulars of installation referred to in this certificate:-
Main Switch or Circuit breaker:-
BS:- (60947/3)
Current rating:- (100A)
Type:- (AC22A)
No of Poles:- (2)
Location:- (Under stairs)
Voltage Rating:- (400)
Fuse rating or setting:- (100)
RCD trip time:- (n/a) #
RCD x 1:- (n/a) #
# = Applicable only where RCD is suitable and is used as a main circuit breaker.

OMS - What's confusing, is that the box for 'type' is very small - only big enough to write a small number, not really two long words ?
But yes, I will add it to my list of questions.
Many thanks
Ady

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 11 December 2013 10:56 PM
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Zs

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ah, main switch or circuit breaker.

A circuit breaker would have a type.

Zs

Edit...you'll have to zoom your screen but the avatar is the punky bracelet made out of hager spirit levels and silver fuses at the ends. Made for me by a darling fellow at the office job. I love it. Check out the position of all the bubbles, they are all over the place.
 12 December 2013 08:59 AM
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OMS

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Both a main switch and circuit breaker would technically have a type - but in this case, Zs has it spot - it's there if your main switch may also an active device (ie MCCB or the like).

A domestic main switch to BS EN 60947 - 3 doesn't have a fuse rating or setting, so inserting "100A" isn't applicable, and the voltage rating probably isn't 400V either.

If it is typical domesic consumer unit switches, then I would put:

Main Switch or Circuit breaker:-
BS:- 60947 - 3
Current rating:- 100A
Type:- Switch Disconnector
No of Poles:- (2)
Location:- (Under stairs)
Voltage Rating:- (240V, 50Hz)
Fuse rating or setting:- (N/A)

You would comment on the applicable utilization category ie if it's AC22A (which it isn't usually) within the report ie Under "General" - "............appropriate switching devices......................." and within the condition report - Section 4

Regards

OMS

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 12 December 2013 10:27 PM
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maltrefor

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Originally posted by: OMS




A domestic main switch to BS EN 60947 - 3 doesn't have a fuse rating or setting, so inserting "100A" isn't applicable, and the voltage rating probably isn't 400V either.



Regards



OMS


Hager is one that is rated at 400V.

Edited: 12 December 2013 at 11:06 PM by maltrefor
 13 December 2013 10:15 AM
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ady1

Posts: 766
Joined: 19 April 2005

I think you've got it there
Thanks all.
An interesting point though.
ps. Yes, I was referring to Hager boards, which their switches are rated at 400v

Kind Regards
Ady

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 13 December 2013 05:33 PM
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ady1

Posts: 766
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Annual assessment today....
Switch dissconnector or N/A
It only applies when referring to an RCCB as a main switch -
As our resident top dog's suggested

Regards
Ady

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 13 December 2013 06:55 PM
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bak1950

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BS EN 60947 has I think 9 types. Its the number 1-9 that you put in the small box. usually "3" for domestic
 13 December 2013 09:56 PM
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leckie

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Well bak1950, I must admit that's how I do it as well.

And don't believe everything anNICEIC inspector says! They only have an opinion, just the same as us.
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