ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
VFD MotorFeeders
by Yoopersup. 10/17/17 09:50 AM
What do you do?
by gfretwell. 10/17/17 01:08 AM
Good ol' copper pipe in the fuse holder trick
by HotLine1. 10/16/17 07:16 PM
Generator Cable Sizing
by HotLine1. 10/16/17 07:13 PM
Another generator question
by HotLine1. 10/16/17 07:02 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
241,344 Are you busy
177,297 Re: Forum
168,925 Need opinion
Who's Online Now
0 registered members (), 41 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
Page 1 of 2 1 2
#64152 - 04/01/06 02:12 AM fuse rejectors  
Sixer  Offline
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

#64153 - 04/01/06 03:48 AM Re: fuse rejectors  
e57  Offline
Joined: May 2003
Posts: 2,876
They reject different fuse types as well.

Mark Heller
"Well - I oughta....." -Jackie Gleason

#64154 - 04/01/06 05:47 AM Re: fuse rejectors  
Trumpy  Offline

Joined: Jul 2002
Posts: 8,223
SI,New Zealand
Define the term "rejector"?.

#64155 - 04/01/06 06:46 AM Re: fuse rejectors  
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

#64156 - 04/01/06 11:12 AM Re: fuse rejectors  
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!

#64157 - 04/01/06 03:21 PM Re: fuse rejectors  
Sixer  Offline
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?"

#64158 - 04/01/06 05:36 PM Re: fuse rejectors  
jwhite  Offline
Joined: Dec 2005
Posts: 64
Trenton, NC, USA
They used to make a 35 amp edison base fuse.

#64159 - 04/01/06 11:41 PM Re: fuse rejectors  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,121
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

#218334 - 03/19/17 02:45 PM Re: fuse rejectors [Re: Sixer]  
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

#218336 - 03/20/17 08:14 PM Re: fuse rejectors [Re: Sixer]  
HotLine1  Offline

Joined: Apr 2002
Posts: 6,872
Brick, NJ USA
Go to or Littlefuse website, customer service, and ask for a supplier in your area.


Page 1 of 2 1 2

Member Spotlight
CA, Inland Empire
Posts: 43
Joined: September 2013
Show All Member Profiles 

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.026s Queries: 16 (0.003s) Memory: 0.8188 MB (Peak: 0.9939 MB) Zlib enabled. Server Time: 2017-10-18 00:04:44 UTC