BoatBanter.com - View Single Post

iBoaterer[_3_]

In article ,
says...

On Wed, 1 May 2013 16:53:21 -0400, iBoaterer wrote:

Which addition of the code is this in and what section? Does it specify
that the addendum was because of CFL's?

What are you talking about?

The required neutral is specified in NFPA70 (NEC) article 404.2(C).

This came about because the 2 wire devices do not work with LEDs and
CFLs. They work OK with incandescents.
You need a neutral for a 3 wire device and these electronic bulbs
require a 3 wire switching device of you want automatic operation.

That automatic control ends up being encouraged by several energy
codes including the ICC codes and LEEDs.

Some of the ICC references for occupancy sensors

505.2.1.1 Classrooms and meeting rooms.
A control device shall be installed in classrooms (except shop
classrooms, laboratory classrooms, and preschool through 12th grade
classrooms), conference/meeting rooms and employee lunch and break
rooms that automatically turns lighting off within 30 minutes of all
occupants leaving a space. These spaces are not required to be
connected to other automatic lighting shutoff controls.

05.2.2 Automatic lighting shutoff.
Buildings larger than 5,000 square feet (465 m2) shall be equipped
with an automatic control device to shut off lighting in those areas.
This automatic control device shall function on either:
1. A scheduled basis, using time-of-day, with an independent program
schedule that controls the interior lighting in areas that do not
exceed 25,000 square feet (2323 m2) and are not more than one floor;
or
2. An occupant sensor that shall turn lighting off within 30 minutes
of an occupant leaving a space; or

505.2.1.2 All other spaces.
Each control device shall be activated either manually by an occupant
or automatically by sensing an occupant and be capable of overriding
any time-of-day scheduled shut-off control for no more than four hours
in accordance with Section 505.2.2.1. Spatial control shall be limited
as shown in Table 505.2.1.2:

Folks out there in the Peoples Republic of California have even
stricter "Title 24" requirements.
The familiar T12 florescent tube has been banned for years.

And has NOTHING to do with CFL's. NOTHING.