Fuse types

[RedDog]

Just to be sure....Fuse has blown on one channel of my DMX dimmer pack, result of lamp blowing.

The barely readable info is.. F (or P ) 6.3AL250V

I am assuming at this stage that 6.3A 640V is the same, and that, as it's on a lamp circuit it wil be quick blow.

 

 

 

[Shez]

What dimmer is it? Fuse values are normally either printed on the rack or in the manual.

[RedDog]

Err.... forgot to make a note of that...!I'll climb back up into the roof later...

 

 

 

[xllx]

I am assuming at this stage that 6.3A 640V is the same, and that, as it's on a lamp circuit it wil be quick blow.

 

Probably best stick to 250v, not 640v!

 

 

The hard to read letter is almost certainly an F, options are FF,F,M,T,TT

 

F - Fast Acting

 

6.3A - 6.3 Amps

 

L - Low breaking capacity

 

250V - 250 volts

[adam2]

The voltage rating of a fuse is the highest voltage circuit in which it may safely be used. Use on a lower voltage is fine.

 

640 volt fuse on a 240 volt circuit=fine.

 

240 volt fuse on a 640 volt circuit=potentially dangerous.

 

It may be observed in passing that 640 volt circuits are very rare, as are fuses for such a voltage. Might be a typo for 240 volts ? or misread ?

 

Fuses for dimmers should be fast acting, type F. Whilst it is often advised that fuses be replaced "like for like" that presumes that the blown fuse was correct and not what someone had to hand last time.

 

 

 

[xllx]

Might be a typo for 240 volts ? or misread ?

 

 

I suspect it was a typo :-)

[RedDog]

thanks for that...

I am assuming at this stage that 6.3A 640V is the same, and that, as it's on a lamp circuit it wil be quick blow.

 

Probably best stick to 250v, not 640v!

 

 

The hard to read letter is almost certainly an F, options are FF,F,M,T,TT

 

F - Fast Acting

 

6.3A - 6.3 Amps

 

L - Low breaking capacity

 

250V - 250 volts

 

Indeed it was...

 

Might be a typo for 240 volts ? or misread ?

 

 

I suspect it was a typo :-)