Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
Which fuse type is used more often for fused disconnect switches and why? Maybe it's about equal but don't. Thanks.
Fast Acting or Time Delay
- Thread starter Alwayslearningelec
- Start date
Depends on the load! Motor loads, Inductive loads….Time Delay!
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
Oh, ok. Thanks.
A given size switch ie: 30, 60.100 amp etc. will commonly take either type fuse. You will note with loads like motors the fast acting fuse would be a higher amperage than a time delay resulting in the need for a larger ampere switch. For instance a 10hp 480v would use a 25 amp time delay but a 45 amp fast acting
Last edited:
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
Someone needs to post the picture of the "extra time delay" fuse which is a piece of copper pipe 
- Location
- New Jersey
- Occupation
- Journeyman Electrician
As a general rule almost always time delay.
- Location
- Illinois
- Occupation
- retired electrician
Someone needs to post the picture of the "extra time delay" fuse which is a piece of copper pipe
Delicate electronic equipment loads will most likely require fast-acting fuses.