The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Locked rotor, no burnout
by andey
09/30/16 04:48 AM
Temporarily feeding a panel...
by Potseal
09/29/16 11:05 PM
Massive power outage South Australia
by Meadow
09/29/16 06:46 AM
short circuit??
by Meadow
09/29/16 06:43 AM
Norwegian power?
by Meadow
09/29/16 06:36 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
HotLine1 14
sparky 10
sparky66wv 8
gfretwell 8
Potseal 7
Who's Online
2 registered (ghost307, cableguy619), 287 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#174480 - 02/05/08 05:46 PM Bathroom exhaust fans
HCE727 Offline
Member

Registered: 11/11/05
Posts: 190
Loc: Delaware County, PA, USA
Do bathroom exhaust fans have to be switched with the lighting or can they be individually switched?
_________________________
Hank

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#174483 - 02/05/08 06:15 PM Re: Bathroom exhaust fans [Re: HCE727]
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: 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.

Top
#174496 - 02/06/08 03:38 AM Re: Bathroom exhaust fans [Re: Redsy]
SteveFehr Offline
Member

Registered: 03/19/05
Posts: 1192
Loc: 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.

Top
#174501 - 02/06/08 05:09 AM Re: Bathroom exhaust fans [Re: SteveFehr]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6786
Loc: 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

Top
#174504 - 02/06/08 07:18 AM Re: Bathroom exhaust fans [Re: HotLine1]
electure Offline

Member

Registered: 12/24/00
Posts: 4225
Loc: 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 \:D

Top
#174505 - 02/06/08 07:23 AM Re: Bathroom exhaust fans [Re: HotLine1]
togol Offline
Member

Registered: 09/15/05
Posts: 426
Loc: 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

Top
#174510 - 02/06/08 08:43 AM Re: Bathroom exhaust fans [Re: togol]
SteveFehr Offline
Member

Registered: 03/19/05
Posts: 1192
Loc: 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.

Top
#174513 - 02/06/08 09:12 AM Re: Bathroom exhaust fans [Re: SteveFehr]
JValdes Offline
Member

Registered: 06/03/07
Posts: 308
Loc: 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.

Top
#174525 - 02/06/08 04:26 PM Re: Bathroom exhaust fans [Re: JValdes]
JoeyD Offline
Member

Registered: 01/19/08
Posts: 21
Loc: 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

Top
#174527 - 02/06/08 05:51 PM Re: Bathroom exhaust fans [Re: JoeyD]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6786
Loc: 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

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals