ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Do we need grounding?
by tortuga - 03/18/24 08:39 PM
240V only in a home and NEC?
by tortuga - 03/18/24 04:29 PM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
Test Post
by sabrown - 03/06/24 05:29 PM
Solar PV Wiring Errors
by renosteinke - 03/02/24 09:12 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 84 guests, and 12 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
#194608 06/13/10 09:27 PM
Joined: Jun 2010
Posts: 9
R
New Member
per the 2008 NEC how many steps need to be present to justify a 3-way system,,, example 2, 4, 6,

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

Joined: Apr 2002
Posts: 7,380
Likes: 7
Member
210.70 (a)(2)(c) provides the answer...

"(c) Where one or more lighting outlet(s) are installed for interior stairways, there shall be a wall switch at each floor level, and landing level that includes an entryway, to control the lighting outlet(s) where the stairway between floor levels has six risers or more. "


John
Joined: Jul 2007
Posts: 1,335
S
Member
your local building code may have more to say on the switching requirements


"Live Awesome!" - Kevin Carosa
Joined: Jul 2002
Posts: 8,443
Likes: 3
Member
A lot of what I am seeing these days is not actual switches, but PIR switching on stairwells.
Where as a given flight of stairs might have a sensor on it, it will trigger on movement at the bottom of the stairs and also trigger a delay timer at the top of that set of stairs, that energises the next PIR (and lights) and turns off the lower lighting.
If it saves lights being left on all night,, I'm all for it.

Having said that, in fire situations, it's all lights on.

Trumpy #195150 07/13/10 01:33 PM
Joined: Jul 2004
Posts: 9,919
Likes: 30
G
Member
I like motion lights. The light follows you around my house, inside and out.


Greg Fretwell
Joined: Mar 2005
Posts: 1,803
Member
My wife follows me round the house switching them off, which is nearly the same but with added mutterings about utility bills laugh ! Seriously, you could lose all the cost saving advantages of low-energy lights if the switch timers are of too short a duration. They don't like short runs.


Wood work but can't!
Joined: Jul 2004
Posts: 9,919
Likes: 30
G
Member
I thought that was true but I have CFLs in the motion lights in my garage, the post light out front and one of the lights inside. They seem to be holding up OK.


Greg Fretwell
Joined: Feb 2002
Posts: 2,233
H
Member
Do you really need a 3 way switch at the top and bottom of the stairs when the stairway goes into an attic? smile

Joined: Apr 2002
Posts: 7,380
Likes: 7
Member
Harold:
It will depend on the definition/use of the 'attic'.

Pull down stairs for access to the space I would say only a switch at the entry, walk-up stairs to a space that could be 'occupied' may require a 3-way. Intent and design fall into the discussion at that point.



John
Joined: Mar 2007
Posts: 101
M
Member
PIR switches are nice but they have to have regular switching. So as not to leave anyone in darkness.

Page 1 of 2 1 2

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5