|
Question
 | | | | | 
Feb 23, 2006, 01:14 PM
| | New Member  | | Join Date: Feb 2006 Location: PARADIS.LA.
Posts: 9
| | | Type H Fuse????
ME AGAIN,WAS TOLD TO BUY A 30 AMP DISCONNECT FOR AIR CONDITIONING UNIT.PURCHASED AN EATON/CUTLER HAMMER # 1 DPF221RP.IT SAYS IT ACCEPTS CLASS H FUSES.CANT SEEM TO FIND ANYONE WHO KNOWS WHAT A CLASS H FUSE IS.BEEN TO ACE AND HOME DEPOT,CAN ANYONE HELP??? 
| | | | | | |
Answers
| | | | | |
Feb 23, 2006, 01:51 PM
|
#2
| | | Senior Electrical & Lighting Expert
Join Date: Jan 2005
Posts: 5,810
| Give me the model nimber of the switch. Class H is a renewable fuse, and there are code restricitions on their use. There are other classes of fuses that this switch must work with.
Nevermind I just saw the number in the post, be back at you later. |
 | | | | | | | | | | | | |
Feb 23, 2006, 02:25 PM
|
#3
| | | Senior Electrical & Lighting Expert
Join Date: Jan 2005
Posts: 5,810
| OK See the attached product sheet, you want a Bussman # NON-30, assuming a 30 amp fuse. It is a 250 volt no renewable fuse, 2 " long, and goes up to 30 a.
This is your plain vanilla everyday general purpose fuse that should be easily found at electrical supply houses.
Disreard my previous comment on code restriction, I first saw "renewable" and that is what has code restrections, not the Class H. | |
| | | | | | | | | | | | |
Feb 23, 2006, 02:50 PM
|
#4
| | New Member
Join Date: Feb 2006 Location: PARADIS.LA.
Posts: 9
| Much Thanks Tk | |
| | | | | | | | | | | | |
Feb 23, 2006, 03:46 PM
|
#5
| | Full Member
Join Date: Jan 2006 Location: New York City (although currently overseas)
Posts: 322
| Pardon my curious ignorance, but what is a "renewable" fuse? | |
| | | | | | | | | | | | |
Feb 23, 2006, 04:12 PM
|
#6
| | | Senior Electrical & Lighting Expert
Join Date: Jan 2005
Posts: 5,810
| A cartridge fuse that has screw cap type ferrules and the metal fuse links.
Links come several in a box, if a fuse blew, pull the fuse out , open the cap and thread thru another link. The cases are reused.
These are restricted to places under direct supervison, such as large industrial, they use them to save money due to large quantity of fuses blown.
In the hands of the public, you could have 100 amp links in 30 amp fuse. Would look like when Chicago burned. | |
| | | | | | | | | | | | |
Feb 23, 2006, 04:38 PM
|
#7
| | Full Member
Join Date: Jan 2006 Location: New York City (although currently overseas)
Posts: 322
| Aha. Thank you for the explanation. | |
| | | | | | | | | | | | |
Apr 27, 2006, 01:00 PM
|
#8
| | New Member
Join Date: Apr 2006 Location: Florida
Posts: 1
| Back to the restrictions for renewable fuses. Where can I read more on the restrictions.
Thanks | |
| | | | | | | | | | | | |
Apr 27, 2006, 01:30 PM
|
#9
| | Senior Electrical & Lighting Expert
Join Date: Jan 2005
Posts: 5,810
| The NFPA 70 National Electric Code 2005 Edition. | |
| | | | | | | | | | | | |
Apr 23, 2007, 12:45 PM
|
#10
| | New Member
Join Date: Apr 2007
Posts: 1
| A class H fuse is simply a one time fuse or a renewable element fuse. It is of the least expensive type fuse available. It is not necessary to use a class H fuse in your disconnect. You can use a RK5 fuse or an RK1. Basically this determines the interrupting rating of the fuse. The higher the interrupting the better the fuse.
I would recommend a Littelfuse FLNR(amperage). This is a RK5 fuse and will suit your application. | |
| | | | | | | | Thread Tools | Search this Thread | | | | | Display Modes |  Linear Mode | |
Thread Tools |
|
Search this Thread |
|
Bookmarks
| |
|
