What size Fuses do I require?

[Gavin Millar]

Hi,

I have a three phase switch fuse supplying a 16A socket. In the specification provided it states the following:

Design Current - 16A
Main Protective Device 20A

The circuit is fed from a C20 MCCB at the distribution board.

What size of fuses should I be putting in the switch fuse?

16A or 20A?

Thank you.

 

[SparkyChick]

I would say fuses appropriate to protect the cable connecting the switch fuse to the socket.

 

[Pete999]

Hi,

I have a three phase switch fuse supplying a 16A socket. In the specification provided it states the following:

Design Current - 16A
Main Protective Device 20A

The circuit is fed from a C20 MCCB at the distribution board.

What size of fuses should I be putting in the switch fuse?

16A or 20A?

Thank you.

Don't mean to be funny, are you an Electrician? do you have any electrical experience? sorry for the questioning but your profile reveals nothing.

 

[Gavin Millar]

Don't mean to be funny, are you an Electrician? do you have any electrical experience? sorry for the questioning but your profile reveals nothing.

I am a trainee electrician and it is a question asked today at college to which the discussion never revealed a correct answer, we thought that it would be 16A fuses due to it being a 16A socket.

 

[Squid]

I can't answer your question but I believe there is a trainee section that will be able to help with these types of question and many more that you may have without the snide comments ;o))))))

Good luck in your training, I'd just use Wriggleys chewing gum wrapping to be honest but then you won't pass any exams ;o))))))

 

[telectrix]

I can't answer your question but I believe there is a trainee section that will be able to help with these types of question and many more that you may have without the snide comments ;o))))))

Good luck in your training, I'd just use Wriggleys chewing gum wrapping to be honest but then you won't pass any exams ;o))))))

and of course, you leave the partly chewed gum in there as a flash guard, even though it's more hazardous than asbestos. i can honestly say, i've never got my shoe stuck in discarded asbestos.

 

[Fitzy]

Don't mean to be funny, are you an Electrician? do you have any electrical experience? sorry for the questioning but your profile reveals nothing.

Not being funny either Pete999, but your profile doesn’t show your qualifications either, even outdated ones.....

 

[GMES]

Yeah we are getting a fair few reports about the constant questioning of quals and empty profiles, maybe we could just start answering the questions with a relevant answer.
Cheers
GMES

 

[Pete999]

I am a trainee electrician and it is a question asked today at college to which the discussion never revealed a correct answer, we thought that it would be 16A fuses due to it being a 16A socket.

Thanks Gavin, it makes it easier to answer that's the reason for asking

 

[Pete999]

Not being funny either Pete999, but your profile doesn’t show your qualifications either, even outdated ones.....

Thats because I fell in line, and deleted them I will put them back on tomorrow even the outdated ones if you wish me to.

 

[GMES]

I am a trainee electrician and it is a question asked today at college to which the discussion never revealed a correct answer, we thought that it would be 16A fuses due to it being a 16A socket.

Pm sent Gavin

 

[Pete999]

Yeah we are getting a fair few reports about the constant questioning of quals and empty profiles, maybe we could just start answering the questions with a relevant answer.
Cheers
GMES

Perhaps some discussions among staff members would be a good idea, all on the same page so to speak.

 

[westward10]

To the OP I believe if you look in GN1 it gives a suggested maximum overcurrent protective device of 20A. I believe this is due to the fact a radial of more than one 16A socket can be employed, after this 32A, 63A etc... are suggested to be single point radials with a protective device used to match their rating. If however the circuit supplies one 16A socket I see no reason to use anything above a 16A protective device.

 

[telectrix]

this question is problematic.one would assume that the 16A circuit would be protected with a OCPD suitable for the cable and load. so 16A or 20A would be appropriate.however,you'd not achieve discrimination with the 20A MCCB. catch 22 here.

 

[telectrix]

Thats because I fell in line, and deleted them I will put them back on tomorrow even the outdated ones if you wish me to.

great thoughts pete,but please translate them from latin for the younger members. .