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
Forum Software Upgrade coming soon...
by Webmaster
54 minutes 3 seconds ago
Faricating Guards out if Lexan?
by frank
Today at 04:33 PM
Would ELV branch circuits be a good idea?
by LongRunner
Today at 07:42 AM
100% breakers?
by Texas_Ranger
Today at 06:13 AM
Dangerous DIY Advice
by Potseal
01/12/17 09:52 AM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
HotLine1 15
gfretwell 11
ghost307 10
Webmaster 10
sparkyinak 9
Who's Online
1 registered (lesk), 115 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#129259 - 12/05/04 06:27 AM Checking Fluorescent light ballist
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: Chandler, AZ USA
What should the voltage output on a ballist be on a standard 2 or 4 bulb 4ft fluorescent light fixture. How would you determine they are bad if its not visually obvious?
_________________________
The Golden Rule - "The man with the gold makes the rule"

Top
#129260 - 12/07/04 07:39 AM Re: Checking Fluorescent light ballist
sabrown Offline
Member

Registered: 12/12/02
Posts: 298
Loc: Ogden, Utah, USA
There are many different "standard" ballasts and lacking experience and not knowing if you are measuring starting voltage or filament voltage, I do not know the common answer. The answer would be available from your ballast manufacturer.

Now stating that, Lithonia offers "Fluorescent Ballast Testing" information in the back of their catalog which includes how to test and meter settings. The information appears to be fairly comprehensive.

Remember to wear proper PPE while doing this and take precautions (it would not be in your best interest to fall off a ladder).

Goodluck,
Shane

Top
#129261 - 12/10/04 09:22 PM Re: Checking Fluorescent light ballist
Scott35 Offline

Broom Pusher and
Member

Registered: 10/19/00
Posts: 2724
Loc: Anaheim, CA. USA
Allrightee-Now Here's some data per current issue...

For the Common type Lamp-Ballast Assembly, using "Magnetic" (Linear Reactor) type Ballasting to drive either one or two 48" Lamps, via Rapid Start and Hot Cathode operation method:

** 1: F32T8 Lamp Types:
a: Single Lamp -
* Starting Voltage = 200 VAC,
* Fillament Voltage = 3.4 to 4.5 VAC
b: Two Lamp -
* Starting Voltage = 300 VAC,
* Fillament Voltage = 3.4 to 4.5 VAC

** 2: F40T8 Lamp Types:
a: Single Lamp -
* Starting Voltage = 250 VAC,
* Fillament Voltage = 3.4 to 4.5 VAC
b: Two Lamp -
* Starting Voltage = 385 VAC,
* Fillament Voltage = 3.4 to 4.5 VAC

** 3: F40T12 Lamp Types:
a: Single Lamp -
* Starting Voltage = 200 VAC,
* Fillament Voltage = 3.4 to 4.5 VAC
b: Two Lamp -
* Starting Voltage = 256 VAC,
* Fillament Voltage = 3.4 to 4.5 VAC

These are 430 MA (Milli Amp) Lamps - the ones with the "Standard" Bipin ends.

Ratings for "H.O." (800 MA) and "V.H.O." (1500 MA) types are about the same for their 430 MA counterparts, when Started at 0°F, and around 15% lower when Started at 50°F.

Preheat methods require minimum Voltages of like 108 VAC for smaller Lamps, and like 176 VAC for larger Lamps.

Instant Start methods range from 270 VAC for smaller Lamps, to 675 VAC for larger Lamps.

This should be what you were looking for!

Scott35
_________________________
Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

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