Distribution board question

L

Lc1

-

Reaction score

22

• Sep 20, 2017

• #1

Hi
I've been looking at a drawing of an installation. It says it's a 4 way 32A HRC fuse distribution board. Way one is a three phase load and has 40A fuses on each of the phases. The second way has 3 single phase circuits fused at 16A Each, the others are spare. Is it me missing something or can this be done at way 1?

Thanks

 

telectrix

-

Mentor

Esteemed

Arms

Reaction score

67,272

• Sep 20, 2017

• #2

not sure what you are asking.

you seem to have a 4 way 3 phase board.

1st 3 phase way is used. 2nd way is 3 x single phase loads. 3rd and 4th way are spare so can be used for additional circuits.

 

OP

L

Lc1

-

Reaction score

22

• Sep 20, 2017

• #3

I was a little confused as the first way has 40A fuses but it is supposed to be a 32A board ?

Thanks

 

telectrix

-

Mentor

Esteemed

Arms

Reaction score

67,272

• Sep 20, 2017

• #4

what's the rating of the main switch in the board?

 

OP

L

Lc1

-

Reaction score

22

• Sep 20, 2017

• #5

From the drawing. The only other info is a 200A isolator for the board.

Thanks

 

telectrix

-

Mentor

Esteemed

Arms

Reaction score

67,272

• Sep 20, 2017

• #6

so it's a 200A board then. that makes more sense.

 

OP

L

Lc1

-

Reaction score

22

• Sep 20, 2017

• #7

Knew I was missing something. Thanks for the revaluation.

Thanks

 

westward10

Staff member

Admin

Esteemed

Supporter

Reaction score

25,405

• Sep 20, 2017

• #8

If the fuse carrier is rated at 32A it should not have 40A fuses fitted.

 

davesparks

-

Mentor

Esteemed

Arms

Reaction score

16,981

• Sep 20, 2017

• #9

Presumably it is a board like this one, in which case no you can't put 40A fuses in a 32A way!

 

OP

L

Lc1

-

Reaction score

22

• Sep 20, 2017

• #10

Thanks for all the responses. I will dig further into this and reply.

 

westward10

Staff member

Admin

Esteemed

Supporter

Reaction score

25,405

• Sep 20, 2017

• #11

You will get a 40A to fit them Dave, tested an Exel board a few weeks back that had 40s in 32A holders.

 

davesparks

-

Mentor

Esteemed

Arms

Reaction score

16,981

• Sep 20, 2017

• #12

westward10 said:

You will get a 40A to fit them Dave, tested an Exel board a few weeks back that had 40s in 32A holders.

Click to expand...

What I meant was that you should not put a 40A fuse in a fuseholder rated at 32A

 

OP

L

Lc1

-

Reaction score

22

• Sep 21, 2017

• #13

Got a little more info and believe this is the whole picture. The 200A isol mention above is fed from a 63A fuse switch from a main switchboard.

Thanks

 

westward10

Staff member

Admin

Esteemed

Supporter

Reaction score

25,405

• Sep 21, 2017

• #14

I have no idea what you needed to know in the first place.

 

OP

L

Lc1

-

Reaction score

22

• Sep 21, 2017

• #15

I was just thought it was strange that a 40A fuse had been used in a 4 way 32A board. Still don't think it's right.

Thanks

 

westward10

Staff member

Admin

Esteemed

Supporter

Reaction score

25,405

• Sep 21, 2017

• #16

Well it is not if the carrier states 32A and 40A fuses are fitted.