What amp fuse do I need

[garrymum]

Big yellow transformer, converts 230v to 110v for use with a concrete breaker. No fuse in the plug, what size do I need?

 

[luminaire]

13A will suffice if it is a normal 3-pin plug.

 

[bernardgreen]

The size of the fuse required is determined by the transformer' maximum safe working wattage.

With out knowing that cannot give an answer.

The instruction manual may provide the answer.

 

[JohnD]

and there should be a makers rating plate on the thing.

 

[Spark123]

A majority of the tool type transformers also have a thermal cutout on the side of them, what size transformer is it (KVA)?

 

[mdbalson]

If it's a 750 VA transformer it will use a 13amp fuse, as that's mine uses (it's the fuse that it came with)

Mine also as a thermal cutout on the side of it.

 

[JohnD]

If it's a 750 VA transformer it will use a 13amp fuse, as that's mine uses (it's the fuse that it came with)

Mine also as a thermal cutout on the side of it.

750 VA at 240V is only a bit over 3 Amps. So a 5A fuse would be correct.

 

[mdbalson]

750 VA at 240V is only a bit over 3 Amps. So a 5A fuse would be correct.

So why did it come with a 13 amp fuse Fitted (It's made by CED)

 

[JohnD]

You're asking the wrong person

 

[securespark]

Ask CED...unless there are inrushes to cope with.

 

[pdcelec]

only 3A and 13A fuses are recognised so a 13A was fitted