The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

   
Topic Options
Rate This Topic
#21275 - 01/29/03 09:17 PM 18A. breaker = 30A Fuse???
Joe Henry Offline
Junior Member
Registered: 01/29/03
Posts: 2
Can someone please explain this to me? I have a device (electric fishing downrigger) in which the manufacturer has stated the following..."a 30A fuse or an 18A circuit breaker must be installed as close to the battery as possible" Ok, I do not understand this. There are 12AMPS of difference here, so how can they both protect equally? Thanks, Joe.
Top
Work Gear for Electricians and the Trades
#21276 - 01/30/03 04:25 AM Re: 18A. breaker = 30A Fuse???
Redsy Offline
Member
Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
The (non time delay) fuse is oversized to permit inrush (starting) current to flow without blowing it. A thermal circuit breaker has an inherent ability to overcome inrush.
BTW,
It must be a special CB if it is available at 18 amps.
Top
#21277 - 01/30/03 07:03 PM Re: 18A. breaker = 30A Fuse???
HotLine1 Offline


Member
Registered: 04/03/02
Posts: 6833
Loc: Brick, NJ USA
"As close to the BATTERY..."
Gee, is this a "marine" application??
Are ya running it off 12 volt?? 24 volt??
or 120 fropm a genset??
By your wording, it sounds like 12/24 volt DC.
John
_________________________
John
Top
#21278 - 01/30/03 08:20 PM Re: 18A. breaker = 30A Fuse???
Joe Henry Offline
Junior Member
Registered: 01/29/03
Posts: 2
Thanks for the responses guys, I appreciate it. Oh, its a 12Volt battery and it is a marine application, thanks.
Top

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box

Recent Posts
Forum Styles
by Admin
01/24/17 02:22 PM
License exam
by TRUE POWER
01/23/17 09:16 PM
Looking for older post
by sparkyinak
01/23/17 12:27 AM
Members: Non-Members: Did you know?
by Admin
01/22/17 02:34 PM
Safety at heights?
by HotLine1
01/21/17 08:51 PM

Who's Online
1 registered (Admin), 97 Guests and 14 Spiders online.
Key: Admin, Global Mod, Mod
New in the Gallery:
Desk-mounted "power-board"
Top Posters
gfretwell 9066
Trumpy 8560
pauluk 7693
HotLine1 6833
sparky 5545
Member Spotlight
Member Since: 08/17/06
Posts: 358

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals