<![CDATA[Mike Holt's Forum - Lighting]]> http://forums.mikeholt.com/ en Wed, 22 May 2013 10:01:57 GMT vBulletin 60 http://forums.mikeholt.com/images/misc/rss.png <![CDATA[Mike Holt's Forum - Lighting]]> http://forums.mikeholt.com/ treblig http://forums.mikeholt.com/showthread.php?t=153685&goto=newpost Tue, 21 May 2013 23:40:36 GMT :slaphead:Art.410.16(C)(5) I cannot find any mfg. able to provide any documentation that their LED product is approved for use within closet storage... :slaphead:Art.410.16(C)(5) I cannot find any mfg. able to provide any documentation that their LED product is approved for use within closet storage space. I have never seen such info. Have You? ]]> Lighting treblig http://forums.mikeholt.com/showthread.php?t=153685 fluorescent ballast filter? http://forums.mikeholt.com/showthread.php?t=153681&goto=newpost Tue, 21 May 2013 19:35:47 GMT found this in a f32 t8 layin fixture, in the ballast compartment. feed comes into fixture, through this and then to the regular ballast. mfr is power... found this in a f32 t8 layin fixture, in the ballast compartment. feed comes into fixture, through this and then to the regular ballast. mfr is power lighting products inc, out of elpaso texas. catalog number on it is 89G635. found absolutley nothing online about them. they put a phone number on it and that doesnt even work. the only bit of info on this thing is "filter for use with fluorescent lamp". store and fixtures arent that old. any help with what this does?Attachment 8571sorry not the best picture.
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]]> Lighting apjames http://forums.mikeholt.com/showthread.php?t=153681 Remote motion sensor http://forums.mikeholt.com/showthread.php?t=153643&goto=newpost Mon, 20 May 2013 13:31:36 GMT Can anyone here recommend a good quality exterior motion sensor that can be remotely mounted on a bell box to control an existing flood light... Can anyone here recommend a good quality exterior motion sensor that can be remotely mounted on a bell box to control an existing flood light fixture?

Thank you,
Bernard ]]> Lighting Bernard1599 http://forums.mikeholt.com/showthread.php?t=153643 Troffers/Strips http://forums.mikeholt.com/showthread.php?t=153557&goto=newpost Thu, 16 May 2013 05:30:40 GMT I've been a part of this forum for a while, I have my selfish reasons, mostly I want to avoid all the hassle of LinkedIn. Can I ask which brand of White Goods you have a preference for and why?

If you have a job with troffers and strips and industrial hoods is there a brand you like? Dislike? Hate? If so, what about it makes you feel that way?

After working as a contractor for three years I have my own preferences, but what are you looking for out there? And is that thing more important than price at the end of the day? For instance, if you dislike Brand X but Brand X is cheaper/available will you still buy it? ]]> Lighting TNBaer http://forums.mikeholt.com/showthread.php?t=153557 emt codes http://forums.mikeholt.com/showthread.php?t=153556&goto=newpost Thu, 16 May 2013 03:43:52 GMT was on a job site today and I noticed in stock room that the 1x4 fluorescent fixtures were hanging by jack chain and the rows were joined by emt from... was on a job site today and I noticed in stock room that the 1x4 fluorescent fixtures were hanging by jack chain and the rows were joined by emt from fixtures end to end. approx 4 ft between fixtures. Is it permissable to do this since there is no straping of the emt within 3 ft of connectors. ]]> Lighting normbac http://forums.mikeholt.com/showthread.php?t=153556 Mwbc http://forums.mikeholt.com/showthread.php?t=153523&goto=newpost Wed, 15 May 2013 07:56:31 GMT I'm on a job were the existing 277v lighting system controls mostly 2x4 fixtures t8 bulbs,the 3 ckts all share the same nuetral .I thought that when dealing with non lenior loads computers/floresent bulbs its not ideal to share nuetral. ]]> Lighting liquidtite http://forums.mikeholt.com/showthread.php?t=153523 LED Array http://forums.mikeholt.com/showthread.php?t=153522&goto=newpost Wed, 15 May 2013 03:21:43 GMT I want to drive/power 36 3w leds. Any ideas? I want to drive/power 36 3w leds. Any ideas? ]]> Lighting wpatterson http://forums.mikeholt.com/showthread.php?t=153522 High Bay 6 Lamp T8 Fixtures http://forums.mikeholt.com/showthread.php?t=153498&goto=newpost Tue, 14 May 2013 00:53:20 GMT I am installing these fixtures in a warehouse addition, with the factory installed disconnect inside the fixture are you still installing receptacles... I am installing these fixtures in a warehouse addition, with the factory installed disconnect inside the fixture are you still installing receptacles for easier maintence. I was going to wire these with a so/sj type cord, does this cord get sized based on the overcurrent device or can you reduce in size based on individual fixture load. I was reading thru some NEC 400 and not sure on the cord sizing. ]]> Lighting KWH http://forums.mikeholt.com/showthread.php?t=153498 Aircraft style stainless steel cable support? http://forums.mikeholt.com/showthread.php?t=153451&goto=newpost Sat, 11 May 2013 18:41:18 GMT Is it acceptable to wrap aircraft style cable around the opposing right angle pieces on the bottom of a red iron truss for a hanging high bay fixture... Is it acceptable to wrap aircraft style cable around the opposing right angle pieces on the bottom of a red iron truss for a hanging high bay fixture support? It seems to me these sharp angles would weaken the cable and I am hesitant to apply this application. An eye bolt with fender washers would be secure and a far better application. Any convincing evidence would be appreciated. ]]> Lighting captainwireman http://forums.mikeholt.com/showthread.php?t=153451 Looking for church light fixtures http://forums.mikeholt.com/showthread.php?t=153416&goto=newpost Fri, 10 May 2013 02:50:45 GMT I am bidding a job to replace existing church lighting. Ceilings are about 20 feet, all wood with big wood beams. Existing lights are 20 - cylinder... I am bidding a job to replace existing church lighting. Ceilings are about 20 feet, all wood with big wood beams. Existing lights are 20 - cylinder type fixtures that can be adjusted like a spot light with one 500 watt osram bulb in each fixture. The church is about 100 foot wide by 75 feet. Half of the light boxes are against the walls but I could hang the other 10 lights down below the beams.
They are complaining about the maintenance of the existing fixtures and they do not put off enough light. The heat from the 500 watt bulbs is bleaching the wood ceiling. I don't really want the job so I will be bidding high. If anybody has a fixture web site I can check out or any ideals, it would help. Thanks ]]> Lighting delfadelfa http://forums.mikeholt.com/showthread.php?t=153416 Lighting Contactor Issue http://forums.mikeholt.com/showthread.php?t=153402&goto=newpost Thu, 09 May 2013 19:50:57 GMT We manufacture outdoor light controls. We use the industry standard ANSI C136.10 twist-lock interface. Our product is listed 120-277VAC 1800VA. We... We manufacture outdoor light controls. We use the industry standard ANSI C136.10 twist-lock interface. Our product is listed 120-277VAC 1800VA. We have installations throughout North America, Europe and Australia without a single failure, except this one contactor which eats up our product, and it's a different issue every time.

So we went outand did some research. Here are our findings:
The lights are 480VAC single phase.
The contactor is a Square D series 8903 type SQH63 plus twist lock receptacle and lightning arrestor (form G101Y1532).
Contactor rating = 100A.
Load = 53 *400W = 21.2kVA /480 = 44A.
The contactor coil is 240VAC single phase.
Measuring from neutral to line at the twist-lock receptacle, we read 240VAC.
Measuring from neutral to control at the twist-lock receptacle, we read 0 VAC when the relay is open, and 240VAC when the relay is closed.
The load on the contactor coil is only pulling 0.095A = 22.8VA
But when we measure from hot to control at the receptacle with the relay closed, we measure 480VAC.

The city engineer seems to think it’s normal to measure 480VAC across the line and load at the receptacle and Square D seems to think something’s wired wrong.

We have plenty of other 240/480 installations on the same series contactor with zero problems to date. Just this one.

Can anyone tell me what’s going on here?

 ]]> Lighting mgookin http://forums.mikeholt.com/showthread.php?t=153402 Automatic control means http://forums.mikeholt.com/showthread.php?t=153339&goto=newpost Tue, 07 May 2013 05:38:34 GMT Is it legal to have an automatic control means such as a motion sensor or passive infra red sensor for electrical equipment general lighting? Is it legal to have an automatic control means such as a motion sensor or passive infra red sensor for electrical equipment general lighting? ]]> Lighting captainwireman http://forums.mikeholt.com/showthread.php?t=153339 arcfault in public hallways http://forums.mikeholt.com/showthread.php?t=153328&goto=newpost Mon, 06 May 2013 21:42:53 GMT can any one clarify if a public corridor or staircase needs a arcfaults breaker on lighting can any one clarify if a public corridor or staircase
needs a arcfaults breaker on lighting ]]> Lighting contactm http://forums.mikeholt.com/showthread.php?t=153328 emt support light http://forums.mikeholt.com/showthread.php?t=153290&goto=newpost Sun, 05 May 2013 04:33:25 GMT I am on a commercial project the plans call for me to hang conduit from a celing jbox to a jbox which is to be used to support a pendant light. I... I am on a commercial project the plans call for me to hang conduit from a celing jbox
to a jbox which is to be used to support a pendant light. I would need to hang 5ft of conduit from celing and float a 4s box then install fixture on jbox. I have always thought it was not permissable to support anything from conduit. Is this application seem code compliant. TIA ]]> Lighting normbac http://forums.mikeholt.com/showthread.php?t=153290 rope lights http://forums.mikeholt.com/showthread.php?t=153278&goto=newpost Sat, 04 May 2013 13:57:07 GMT I have been doing forum search for rope lights, "rope lights", and rope + lights. I get every result containing the word "light," which is not much different than every result on lighting forum. Is there a way to narrow down search?

Although I'm sure situation has been discussed before, I'll put it here anyway:

Customer has rope lighting around top of kitchen cabinets, I did not bother with exact measure since I assumed I would be cutting off roll, +- 75'. Several sections have burned out, I recommended replacing entire rope, since the sections still working were the same age as the burnt out sections.

So while my focus was elsewhere, the bulk rolls of incandescent rope lights aren't UL approved (I know this is old news to active electricians).

What is my best next move? Thanks. ]]> Lighting readydave8 http://forums.mikeholt.com/showthread.php?t=153278