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?

They reject different fuse types as well.

Define the term "rejector"?.

Mike you can find info here

http://www.littelfuse.com/cgi-bin/r.cgi/en/prod_series.html?SeriesID=129&LFSESSION=pkqP0Dgxlf

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.

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!

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: http://www.hvactool.com/product_images/MA-16SA.gif
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.

They used to make a 35 amp edison base fuse.

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.

Anybody can help to let me know from where I can buy fuse rejectors, I asked different supplier, nobody carry it

Go to Bussmann.com or Littlefuse website, customer service, and ask for a supplier in your area.

Hello Sixer

It’s been my experience that fuse rejecters come in 15, 20 and 25 amp models. There is no need for a 30 amp rejecter as you have so rightly pointed out that 30 amp is the largest plug fuse made. 25’s are rarely seen as they are really only necessary in certain specific situations where a calculated load on an A/C system or a heating load or the like calls for a 25 amp fuse. It’s becoming increasingly difficult to find even the more common fuse rejecters are most insurance companies are insisting on upgrades to breaker panels. Hope this helps.

Terry
www.theshockdoctors.ca

I am old enough to remember new installs of fuse panels and typically they would use a pullout for a 30a load like a dryer. The last one I saw installed was 1971 tho.
If you use the S adapters, there is no code reason why you can't install one today. I think I would fight an insurance company that screwed with me if it was code compliant.
One thing you need to watch for is there is an S adapter that will take a 20 and a 30. If it is installed on a 20a (12ga) circuit, it looks legal but it is not. I found a box stuffed with these adapters and a 30a fuse in half of them. Some were even on 14ga wire so it was impossible to be code compliant. I strongly recommended a replacement panel.

Greg:
I'm in agreement with you that there are no code restrictions on installing a fuse panel. However, one would have to look really hard to find one I believe.

Plug fuse panels are becoming very rare, however I do come upon one occasionally. A 12 circuit plug fuse, 60 amp service was 'discovered' on inspection of a solar install. I strongly suggested to the HO that the funds she 'saves' from the solar she should invest in a new 100 amp service. LOL

Back in the day, "fusestats" (S-Fuses) were 'stock' in the trucks of the EC I worked for, as he did a lot of 'inner city' work, and most of the multi family dwellings had fuse panels. 30s were a common find, lots of blown 15s and 20s on the floor, and yes, there were a few fires due to overloads on the 14 Ga. conductors.

Fusible panels were still in the catalogs in the 1970's.