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3-ways in stairs #194608 06/13/10 08:27 PM
Joined: Jun 2010
Posts: 9
romex2121 Offline OP
New Member
per the 2008 NEC how many steps need to be present to justify a 3-way system,,, example 2, 4, 6,

Building Codes & Related References
Re: 3-ways in stairs [Re: romex2121] #194611 06/13/10 09:23 PM
Joined: Apr 2002
Posts: 7,235
HotLine1 Offline
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. "

Re: 3-ways in stairs [Re: HotLine1] #194805 06/23/10 03:15 AM
Joined: Jul 2007
Posts: 1,335
sparkyinak Offline
your local building code may have more to say on the switching requirements

"Live Awesome!" - Kevin Carosa
Re: 3-ways in stairs [Re: sparkyinak] #195137 07/13/10 03:08 AM
Joined: Jul 2002
Posts: 8,379
Trumpy Offline
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.

Re: 3-ways in stairs [Re: Trumpy] #195150 07/13/10 12:33 PM
Joined: Jul 2004
Posts: 9,571
gfretwell Offline
I like motion lights. The light follows you around my house, inside and out.

Greg Fretwell
Re: 3-ways in stairs [Re: gfretwell] #195425 08/02/10 03:06 PM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
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!
Re: 3-ways in stairs [Re: Alan Belson] #195427 08/02/10 04:46 PM
Joined: Jul 2004
Posts: 9,571
gfretwell Offline
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
Re: 3-ways in stairs [Re: romex2121] #200306 03/28/11 08:33 AM
Joined: Feb 2002
Posts: 2,233
harold endean Offline
Do you really need a 3 way switch at the top and bottom of the stairs when the stairway goes into an attic? smile

Re: 3-ways in stairs [Re: romex2121] #200308 03/28/11 08:58 AM
Joined: Apr 2002
Posts: 7,235
HotLine1 Offline
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.

Re: 3-ways in stairs [Re: romex2121] #203286 09/18/11 10:02 PM
Joined: Mar 2007
Posts: 101
mikethebull Offline
PIR switches are nice but they have to have regular switching. So as not to leave anyone in darkness.

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