ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
VDE 0100 to introduce AFCIs
by sparky. 01/16/18 06:36 PM
Air Compressor feeder conductor sizing
by Potseal. 01/15/18 09:08 PM
Under carpet cable?
by HotLine1. 01/15/18 09:57 AM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 7 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Code Inquiry Help Pls. #38495
05/24/04 05:33 AM
05/24/04 05:33 AM
T
Text  Offline OP
Junior Member
Joined: May 2004
Posts: 16
Lipa City, Philippines
Is there such a provision wherein if your computed load exceeds 10,000 Watts, the conductor & overcurrent protection shall be rated not less than 38.0 sqmm. and 100AT respectively?

Work Gear for Electricians and the Trades
Re: Code Inquiry Help Pls. #38496
05/24/04 06:15 AM
05/24/04 06:15 AM
W
winnie  Offline
Member
Joined: Sep 2003
Posts: 649
boston, ma
Of course not. 10000W is only 500V on a standard 20A constant current circuit. 2.5mm^2 conductors are sufficient for a 20A circuit.

UEC requirements state that the overvoltage protection shunt be set at no less than 600V, and that all wiring devices be rated to properly short 600V when loads are removed.

I don't understand your question about 'overcurrent protection'. In a constant current system, you don't get over-current. Instead open circuit faults cause excessive voltage; that is why you use overvoltage shunting devices; they safely short out the circuit in the event of an open, preventing dangerous overvoltages.

*grin*

Seriously, Text, you have made the mistake of thinking that everyone on the net is from the same country and using the same electrical code as you. In addition, even when the code version is known, you would also need to describe the context in which you are applying it. What voltages are you talking about, what sort of load is being supplied, what sort of operational duty cycles, etc.

I doubt that you are working with constant current DC circuits, but such things are _possible_, fun to BS about, and sometimes similar to systems that actually do show up (runway lighting, eg). Without knowing the context of your question, it is almost meaningless.

Where are you located?
What code do you use?
What voltage will be used to supply the load?
What are the characteristics of the load?

-Jon

[This message has been edited by winnie (edited 05-24-2004).]

Re: Code Inquiry Help Pls. #38497
05/24/04 07:38 AM
05/24/04 07:38 AM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Jon LOL.

Text welcome to ECN, Jon is correct you need to give more info.

Someone here will always try to help out [Linked Image] fill in some details and you will probably find your answer.


Jon I see you are from Boston drop me an email maybe we have worked in the same areas.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: Code Inquiry Help Pls. #38498
05/24/04 08:05 AM
05/24/04 08:05 AM
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,481
NY, USA
moved to Non-US area >> here


Featured:

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

 

Member Spotlight
electure
electure
Fullerton, CA USA
Posts: 4,263
Joined: December 2000
Show All Member Profiles 
Top Posters(30 Days)
sparky 23
Admin 20
Potseal 13
Popular Topics(Views)
243,516 Are you busy
180,314 Re: Forum
170,811 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.020s Queries: 14 (0.005s) Memory: 0.9592 MB (Peak: 1.0921 MB) Zlib enabled. Server Time: 2018-01-17 11:06:09 UTC