ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Unusual Well Pump Switch Failure
by sabrown - 10/28/20 04:31 PM
Look at this mess...
by InspectorE - 10/27/20 09:09 PM
New tool
by gfretwell - 10/24/20 11:09 AM
Where is Everyone?
by Bill Addiss - 10/17/20 07:04 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Scott35), 18 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
line voltage wall thermostat for baseboard heater #78978 11/14/01 11:27 PM
Joined: Nov 2001
Posts: 2
9
944mike Offline OP
Junior Member
Hi

I have a question for you guys. Is it legal for a line voltage, programable wall thermostat for 240V baseboard heaters to break only one line? I have been told that this is not legal.

I purchased this commercially available line voltage thermostat, sold by Honeywell, that is rated for 240V ONLY, that only breaks one line of a 220V circuit. This thermostat is available for sale currently at Home Depot. My question is, is this legal for residental installations? if not, how can they be manufacturing and selling this thermostat in the United States???

2017 / 2014 NEC & Related Books and Study Guides
Re: line voltage wall thermostat for baseboard heater #78979 11/15/01 09:44 AM
Joined: Nov 2000
Posts: 2,148
R
resqcapt19 Offline
Member
Mike,
Only the disconnect is required to break both conductors. A thermostat is not required to break both sides of the line. If the thermostat has the word "off" on it, then it is a combination thermostat and disconenct and must then break all hot conductors.
See 424-20.
Don(resqcapt19)


Don(resqcapt19)

Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

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

 

Member Spotlight
CDS
CDS
Nicholson Ga
Posts: 34
Joined: June 2006
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
271,034 Are you busy
205,039 Re: Forum
193,154 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3