ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
PLC/HMI Enclosure C2, D1
by ghost307. 10/16/18 03:31 PM
Tingle off the water spigot
by dsk. 10/15/18 02:36 PM
Board tester power supply?
by JoeTestingEngr. 10/13/18 12:14 AM
Voltage sag
by Trumpy. 10/12/18 06:59 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 35 guests, and 27 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Bathroom exhaust fans #174480
02/05/08 09:46 PM
02/05/08 09:46 PM
HCE727  Offline OP
Member
Joined: Nov 2005
Posts: 186
Delaware County, PA, USA
Do bathroom exhaust fans have to be switched with the lighting or can they be individually switched?


Hank
Work Gear for Electricians and the Trades
Re: Bathroom exhaust fans [Re: HCE727] #174483
02/05/08 10:15 PM
02/05/08 10:15 PM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Unless some local ordinance requires it, I can't think of any requirement to have them come on at the same time.


Re: Bathroom exhaust fans [Re: Redsy] #174496
02/06/08 07:38 AM
02/06/08 07:38 AM
S
SteveFehr  Offline
Member
Joined: Mar 2005
Posts: 1,213
Chesapeake, VA
As a HO as well, I'd say it's preferable to have the fan on a separate switch. Switch with a timer is best.

Re: Bathroom exhaust fans [Re: SteveFehr] #174501
02/06/08 09:09 AM
02/06/08 09:09 AM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,035
Brick, NJ USA
HCE:
Design issue. Most commercial have fan on with lighting, and some local Health Depts require it, but I have no substantiation for that.



John
Re: Bathroom exhaust fans [Re: HotLine1] #174504
02/06/08 11:18 AM
02/06/08 11:18 AM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,274
Fullerton, CA USA
Hotline,

Out here in CA all commercial and industrial occupancies require the fan to be switched with the lights.

Either that or the fan must run continuously, or be on a timer so that the fan is on during business hours.

Of course, I don't have a substantiation for it either laugh

Re: Bathroom exhaust fans [Re: HotLine1] #174505
02/06/08 11:23 AM
02/06/08 11:23 AM
togol  Offline
Member
Joined: Sep 2005
Posts: 421
NW In. USA
I was wondering if anyone has ever considered using a humidistat for the fan in place of switches or timers .

it makes it hands-free and 120v units are available, could even remote a sensor and drive the fan with a relay and xfmr


Tom
Re: Bathroom exhaust fans [Re: togol] #174510
02/06/08 12:43 PM
02/06/08 12:43 PM
S
SteveFehr  Offline
Member
Joined: Mar 2005
Posts: 1,213
Chesapeake, VA
For residences, IRC 2006, M1507.3 requires a bathroom or toilet room to have "Mechanical exhaust capacity of 50cfm intermittent or 20cfm continuous." IRC sets no requirement for how this is implemented, only that the capacity must be there. Same switch, separate switch, humidistat, timer, etc- all OK by IRC.

Commercial is different. IMC 2006 400.3 requires commercial bathrooms in dorms, hotels, etc, to have 35cfm ventilation/person. (Continuous is implied.) As 0 people are in the bathroom when the lights are off and 0cfm required, the fan can be tied into the light switch. I'm not familiar enough with IMC to know any other subtleties of the code, or what specifically applies to restrooms in stores or offices.

Re: Bathroom exhaust fans [Re: SteveFehr] #174513
02/06/08 01:12 PM
02/06/08 01:12 PM
J
JValdes  Offline
Member
Joined: Jun 2007
Posts: 301
South Carolina
I always seperate fan and light, unless HO wants both together. No violation of NEC in residential.
I used spring timers when my daughters (4) were still at home. Now, we just use regular swiches so we do not have to listen to the fan until it times out.

Re: Bathroom exhaust fans [Re: JValdes] #174525
02/06/08 08:26 PM
02/06/08 08:26 PM
J
JoeyD  Offline
Member
Joined: Jan 2008
Posts: 21
Arlington MA
I was told in MA the building code states the fan has to come on with the light if there is no windows in the bathroom.
I seperate then unless the owner wants them on at the same time. In a half bath I like the fan on with the lights and using panasonic you can't hear them anyways

Re: Bathroom exhaust fans [Re: JoeyD] #174527
02/06/08 09:51 PM
02/06/08 09:51 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,035
Brick, NJ USA
Electure:
Yes, I agree. Comm is on w/lights, or TC control for occupied hrs. I can't place a Article thou, and say it's a design thing.


John

Featured:

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

 

Member Spotlight
Attic Rat
Attic Rat
Bergen Co.,N.J. USA
Posts: 524
Joined: December 2003
Show All Member Profiles 
Top Posters(30 Days)
sparky 11
Popular Topics(Views)
250,305 Are you busy
187,944 Re: Forum
177,472 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.023s Queries: 15 (0.004s) Memory: 1.0109 MB (Peak: 1.1919 MB) Zlib enabled. Server Time: 2018-10-16 20:52:19 UTC