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fuse rejectors #64152
04/01/06 01:12 AM
04/01/06 01:12 AM
Sixer  Offline OP
Joined: Aug 2005
Posts: 265
Why do they make fuse rejectors for 30 amp plug fuses, when a 30 amp plug fuse is the biggest they make? I thought the rejectors were so you couldn't increase the size of the fuse, but maybe I'm missing something here?


"Will it be cheaper if I drill the holes for you?"
Work Gear for Electricians and the Trades
Re: fuse rejectors #64153
04/01/06 02:48 AM
04/01/06 02:48 AM
e57  Offline
Joined: May 2003
Posts: 2,876
They reject different fuse types as well.

Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: fuse rejectors #64154
04/01/06 04:47 AM
04/01/06 04:47 AM
Trumpy  Offline

Joined: Jul 2002
Posts: 8,260
SI,New Zealand
Define the term "rejector"?.

Re: fuse rejectors #64155
04/01/06 05:46 AM
04/01/06 05:46 AM
iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Mike you can find info here

Older fuse holders in American homes could accept a fuse from 15 to 30 amps.

Many times the homeowners would replace the 15 and 20s with 30s.

So now we screw in a permanent adapter that allows only the correct size fuse replacement.

Bob Badger
Construction & Maintenance Electrician
Re: fuse rejectors #64156
04/01/06 10:12 AM
04/01/06 10:12 AM
Rewired  Offline
Joined: Jan 2006
Posts: 558
Hamilton, Ontario, Canada
I was wondering what you meant when you said a " 30 amp rejector"!
I have never really seen those " Type S" fuses around here... The only one I think I have actually seen was at my old work in the fuse isle buried under a mound of dust!
The " Rejectors" I know of were plastic rings of either the 15 or 20 amp version that you screwed into your panel with a special fiber tool...The 15's would only allow a 15A fuse in but the 20A rejectors would allow a 15 or 20A fuse to be inserted... They worked but I sometimes had problems with them when using some brands of type "D" fuse of the correct rating, the rejectors rejected them too!

Re: fuse rejectors #64157
04/01/06 02:21 PM
04/01/06 02:21 PM
Sixer  Offline OP
Joined: Aug 2005
Posts: 265
Rewire, I know of the rejectors you are talking about, but those are different. I haven't seen those in years.

The ones I'm talking about take the type S fuses that Iwire has linked to. This is the only picture I could find of the adaptor:
The little wire sticking out the side of the threads make it tamper resistant.

My reason for this post is lately we've been installing a lot of these rejectors (adaptors) and type S fuses to satisfy the insurance companies requirements. I couldn't figure out why they even made one for 30 amps, but e57 answered my question (duh...I never even thought of that!)....thanks.


"Will it be cheaper if I drill the holes for you?"
Re: fuse rejectors #64158
04/01/06 04:36 PM
04/01/06 04:36 PM
jwhite  Offline
Joined: Dec 2005
Posts: 64
Trenton, NC, USA
They used to make a 35 amp edison base fuse.

Re: fuse rejectors #64159
04/01/06 10:41 PM
04/01/06 10:41 PM
gfretwell  Offline

Joined: Jul 2004
Posts: 9,338
The S adapter also rejects pennies, gum wrappers and aluminum foil ... even the 30.
The 30a adapter will take a 20 (same thread size) but the 20 won't take a 30. There is a shoulder on the 30a fuse that keeps it from fitting in a 20a adapter.

Greg Fretwell
Re: fuse rejectors [Re: Sixer] #218334
03/19/17 01:45 PM
03/19/17 01:45 PM
SMM  Offline
New Member
Joined: Mar 2017
Posts: 1
Anybody can help to let me know from where I can buy fuse rejectors, I asked different supplier, nobody carry it

Re: fuse rejectors [Re: Sixer] #218336
03/20/17 07:14 PM
03/20/17 07:14 PM
HotLine1  Offline

Joined: Apr 2002
Posts: 7,069
Brick, NJ USA
Go to or Littlefuse website, customer service, and ask for a supplier in your area.

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