Fit standard Edison base fuse receptacles. Resettable upon overload event. From the Manufacturer For replacing Edison base plug fuses in residential fuse panels. This is an Edison base manual reset circuit breaker featuring brass threads with plastic body construction.
Edison base slo-blow fuse replaced by circuit breaker
I have successfully used these very circuit breakers for almost 40 years to protect a submersible well pump and have found them to be very dependable. I heartily reccommend them for anyone maintaining older electrical power installations.
If you have an older Edison style fuse box these are hard to beat. They give you the safety and convenience of a circuit breaker without having to have major electrical work done. I would recommend them to anyone having the old fuse boxes.