10-amp and 6.25-amp plug fuses

[jeff48356]

I remember back when I was a boy, the local hardware store sold 10-amp and 6.25-amp plug fuses. I've always wondered what they would possibly be used for, since the minimum amperage of a branch circuit is 15 amps. Were these used in those fused switches for controlling individual motors? That's the only thing I can think of. Anyone have any experience with these?

 

[ramsy]

Anyone have any experience with these?

Lets see, 15A used as Tapp from 240V 40A electric oven.

Redneck kitchen remodel, forgot convenience outlets on entire wall used by electric oven.

http://m.littelfuse.com/~/media/electrical/datasheets/misc-electrical-products/box.pdf

 

[retirede]

I’ve seen low amperage plug fuses mounted with a switch on the circuit feeding a gas furnace. Usually mounted right in the furnace.

 

[retirede]

Another one - my daughter bought a house that had an old GE electric range in the basement. It had a 120 V convenience receptacle built into the back panel. It had a plug fuse to protect it - I think it was a 10 A.

 

[kwired]

I remember back when I was a boy, the local hardware store sold 10-amp and 6.25-amp plug fuses. I've always wondered what they would possibly be used for, since the minimum amperage of a branch circuit is 15 amps. Were these used in those fused switches for controlling individual motors? That's the only thing I can think of. Anyone have any experience with these?

Branch circuits in general the minimum conductor size permitted is 14 AWG - which is protected by a 15 amp OCPD.

There is a need for less then 15 amp devices for control circuits using 16 or 18 AWG conductors.

You can also use a fuse for motor overload protection.

A 6.25 amp time delay fuse is perfect for a 5 amp motor with 125% overload protection.