ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Recent Posts
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
Power submeter connections
by HotLine1 - 01/19/23 09:09 AM
AFDD's coming to the UK
by Texas_Ranger - 01/17/23 07:22 PM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 17 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#77959 07/29/01 06:27 PM
Joined: Oct 2000
Posts: 5,392
sparky Offline OP
If I install 100' of track lighting, what should i feed it with?

Stay up to Code with the Latest NEC:

2020 NEC & Related Reference & Study Guides
2020 NEC & Related Reference & Study Guides
Pass Your Exam the FIRST TIME with these Exam Prep Combos:

>> Master Electrician Exam Prep     >> JourneyMan Electrician Exam Prep

#77960 07/29/01 08:04 PM
Joined: Oct 2000
Posts: 2,749
220-12 (b) Track Lighting. For track lighting in other than dwelling units or guest rooms of hotels or motels, an additional load of 150 volt-amperes shall be included for every 2 ft (610 mm) of lighting track or fraction thereof.


The requirements of Section 220-12(b) previously appeared in Section 410-102 but they were moved to Article 220 for the 1999 Code since they deal primarily with load calculations.
Suppose a lighting plan shows 62.5 linear ft of single-circuit track lighting for a small department store featuring clothing. Since the actual track lighting fixtures are owner supplied, neither the quantity of track lighting fixtures or the lamp size are specified. What is the minimum calculated load associated with the track lighting that must be added to the service or feeder supplying this store?
According to Section 220-12(b), the minimum calculated load to be added to the service or feeder supplying this track light installation is calculated as follows:
62.5 ft ¸ 2 ft = 31.25 ft
31.25 must be rounded up to 32
32 ´ 150 VA = 4800 VA
4800 VA is the minimum load that must be added to the service or feeder calculation.
It is important to note that the branch circuits supplying this installation are covered in Section 410-101(b). For the track lighting branch-circuit load, the maximum load on the track cannot exceed the rating of the branch circuit supplying the track. Also, the track must be supplied by a branch circuit that has a rating not exceeding the rating of the track. The track length does not enter into the branch-circuit calculation.
Section 220-12(b) is not intended to limit the number of feet of track on a single branch circuit nor is it intended to limit the number of fixtures on an individual track. Rather, this section is intended to be used solely for load calculations of feeders and services.

Joe Tedesco, NEC Consultant
#77961 07/30/01 02:13 AM
Joined: Oct 2000
Posts: 5,392
sparky Offline OP
would'nt you say 220-12(b) is a good 'guide' as the 'load' can be indiscriminatly changed easily?

tracks are not a 'fixed' load that do not change. 410-101(b) and 220-12(b) seem to almost conflict here read side by side.

could each head possibly fall under 220-3(b)(11) @ 180W per?

this just does not sit right. [Linked Image]

[This message has been edited by sparky (edited 07-30-2001).]

#77962 08/07/01 10:34 AM
Joined: May 2001
Posts: 176
From a design standpoint, we have done this in the past:
Using Joe's example, we have 4800va divided by 120 v equals 40Amps divided by 16 (80% of 20) equals 2.5 circuits, rounded up to 3 with less than 16 amps each. That would be the minimum number of circuits required. Of course, more circuits would be better, however, realistically, only one or two fixtures per two foot length is how you will see track lighting. Most applications of the track lighting fixtures use 75-100 watt flood lamps or less. Higher ceilings may require the use of 150watt narrow beam lamps.
Just another thought.

#77963 08/07/01 07:25 PM
Joined: Oct 2000
Posts: 5,392
sparky Offline OP
i would do the same.
my point is that , 220 not applying, i could run #14-2 to 100' of track if the owner wished for 3 heads.

the calc and reality seem to have a wide gap here.

and i don't care what anyone says....
it's IS NOT a fixed load!
only a ladder ( maybe) is required to install more heads.

Link Copied to Clipboard

Tools for Electricians
Tools for Electricians

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Atomic City, ID USA
Posts: 806
Joined: October 2004
Top Posters(30 Days)
BigB 9
triple 3
Popular Topics(Views)
302,561 Are you busy
231,910 Re: Forum
216,545 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5