Outdoor Mercury Vapor Lamp - Starting To Fail - Electrical - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 01-14-2013, 05:03 PM   #1
Newbie
 
Join Date: Jan 2013
Posts: 3
Rewards Points: 10
Default

outdoor Mercury Vapor lamp - starting to fail


Hi. We have an old (1970's-ish) outdoor lamp, automatic on/off. I think it's mercury vapor - the label says: USE ONLY MV-175 WATTS, TYPE H39 LAMP, 120V 60Hz AC Max 4.0A ...

It's been working fine for 40 or 50 years, but lately it sometimes fails to turn on, or turns on hours later than is should.
Any ideas why it would fail only intermittently?

Advertisement

cookieJones is offline   Reply With Quote
Old 01-14-2013, 06:05 PM   #2
Member
 
Oso954's Avatar
 
Join Date: Jun 2012
Location: Northern Calif.
Posts: 1,797
Rewards Points: 1,474
Default

outdoor Mercury Vapor lamp - starting to fail


First thing to try, would be to replace the daylight sensor.

Advertisement

Oso954 is offline   Reply With Quote
Old 01-14-2013, 06:18 PM   #3
Newbie
 
Join Date: Jan 2013
Posts: 3
Rewards Points: 10
Default

outdoor Mercury Vapor lamp - starting to fail


Thanks Oso954 - Is it fairly simple - do they screw on/off or should I get an electrician? I know enough to turn the breaker off first, but that's about it.
cookieJones is offline   Reply With Quote
Old 01-14-2013, 06:26 PM   #4
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,734
Rewards Points: 584
Default

outdoor Mercury Vapor lamp - starting to fail


1/2 turn and lift it off.
joecaption is online now   Reply With Quote
Old 01-14-2013, 07:16 PM   #5
Newbie
 
Join Date: Jan 2013
Posts: 3
Rewards Points: 10
Default

outdoor Mercury Vapor lamp - starting to fail


Excellent - thank you!
cookieJones is offline   Reply With Quote
Old 01-14-2013, 08:16 PM   #6
Member
 
Join Date: Feb 2008
Posts: 309
Rewards Points: 314
Default

outdoor Mercury Vapor lamp - starting to fail


Agree, thats what it was with mine also. I replaced mine-easy twist lock for 8 or 10 bucks .Day/night sensor.
hidden1 is offline   Reply With Quote
Old 01-14-2013, 09:22 PM   #7
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,764
Rewards Points: 2,000
Default

outdoor Mercury Vapor lamp - starting to fail


How long as the current lamp been in the fixture? MV's do last forever, but they get dimmer and dimmer....If it's been a while, you may want to change the lamp also.
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
Old 01-15-2013, 01:16 AM   #8
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000
Default

outdoor Mercury Vapor lamp - starting to fail


Quote:
Originally Posted by Missouri Bound View Post
How long as the current lamp been in the fixture? MV's do last forever, but they get dimmer and dimmer....If it's been a while, you may want to change the lamp also.
They do last very long time however you still can get MV lamps but not the ballast they are no longer legit due the engery pact.


To OP ., If you want to keep simauir luminaire there is a metal halide verison it should have about the same light level as old school MV but only use about half of the power.

100 W MH is about the same as old 175 watter MV are and count the ballast loss that will add up fast so with MH it will actually about 120 watts or so depending on normal or high power facter ballast while common MV useally run about 225 to 250 watts.

Merci,
Marc

Advertisement

__________________
The answer will be based on NEC ( National Electrical code ) or CEC ( Cananda Electrical code ) or ECF ( Electrique Code France )
frenchelectrican is offline   Reply With Quote
The Following User Says Thank You to frenchelectrican For This Useful Post:
NJMarine (01-15-2013)
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Air conditioner not starting - Help needed. pipster HVAC 18 09-26-2011 04:39 PM
Old Water Heaters - replace or wait to fail? AB1337 Plumbing 15 09-03-2011 07:57 PM
how to build a single phase induction motor sashman Electrical 3 03-31-2011 08:18 AM
Help! -- what is causing these shingles to fail? imaginator Roofing/Siding 1 09-18-2010 07:29 PM
Timecutter 16:42z trouble starting and now stopped starting jackdoldno7 Landscaping & Lawn Care 0 09-10-2010 12:43 PM




Top of Page | View New Posts