ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
How's all our Non-US folks doing?
by djk - 07/23/21 09:13 PM
Switched Receptacles -Top or Bottom?
by donles - 07/23/21 10:51 AM
Do You Travel?
by Bill Addiss - 07/20/21 04:26 PM
Backup Generator Done Right
by timmp - 07/18/21 12:20 PM
Square D "All-In-One" Panelboard
by Rachel - 07/16/21 04:57 AM
New in the Gallery:
OOPSIE!
OOPSIE!
by timmp, July 13
AT&T Office Thermostat, Summer
AT&T Office Thermostat, Summer
by timmp, July 13
Who's Online Now
0 members (), 5 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Jul 2002
Posts: 8,407
Likes: 2
Trumpy Offline OP
Member
Guys,
Have a look at this.
It's right here .
Bill provided a link that you will see in his post.
For those of you that are interested in Workplace safety, get this!.

Arc Flash PPE Clothing, LOTO & Insulated Tools
Joined: Dec 2004
Posts: 161
G
Member
Interesting how it suggests fuses (proper ones, not rewireable) protect so much better than mechanical circuit breakers.

Joined: Jul 2002
Posts: 8,407
Likes: 2
Trumpy Offline OP
Member
Gideon,
Quote
Interesting how it suggests fuses (proper ones, not rewireable) protect so much better than mechanical circuit breakers.
HRC (High Rupturing Capacity) Fuses have a lot higher capacity than circuit-breakers, as far as High Energy Faults go.
Where as a Circuit-Breaker will interrupt "destructively" under Fault-Arc conditions, a Fuse package by design, will contain the entire arc within itself.
With the use of fine Silica sand, it forms glass under the heated conditions.
A lot better insulator.
Anyone else got any comments on this document?.

Joined: Mar 2002
Posts: 582
R
Ron Offline
Member
My understanding is that fuses have similar interrupting ratings as circuit breakers. If a overcurrent protective device needs to clear a arc fault, sometimes a circuit breaker will operate first if the arc fault current is below the current limiting range of the fuse. There are very few distribution systems that would benefit from a fuse rated at 300,000AIC, as the systems have fault duties much less than 200,000A.
The referenced safety book has excellent information, but you need to consider the source is only a fuse manufacturer.

[This message has been edited by Ron (edited 06-24-2005).]


Ron
Joined: Jul 2002
Posts: 8,407
Likes: 2
Trumpy Offline OP
Member
Ron,
Quote
The referenced safety book has excellent information, but you need to consider the source is only a fuse manufacturer.

So going by that, should we disregard any Safety stuff put out by manufacturers of related equipment?.
In my opinion, there are a LOT of other things in this document, besides fusing.
I've never used Bussmann products, nor am I likely to.
I just thought that it was nice that they bought a thing like that out.


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
richard
richard
L.I. New York
Posts: 99
Joined: August 2003
Top Posters(30 Days)
timmp 4
Rachel 4
Popular Topics(Views)
281,393 Are you busy
215,034 Re: Forum
201,916 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5