Residential Generator Load Shedding

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Cybatrex

Cybatrex

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Florida
I’ve had a large number of leads and customers wanting portable generator hook ups. In the past I’ve always used a transfer switch in order to do that and installed the panel next to the existing one. However flipping the bill has been an issue and I’ve seen something different.

If you install an interlock kit on the main breaker and connect it to the 30A plug underneath of it. Is it against code to allow the consumer the ability to shed their own load so long as the interlock prevents back feeding the utility?

Any insight or code references would be great.


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I think I found My answer. I was only seeing Article 445 and couldnt figure out where the rest of the information was.

Article 700.3 (B)

(B) Selective Load Pickup, Load Shedding, and Peak Load
Shaving. The alternate power source shall be permitted to supply
emergency, legally required standby, and optional standby system
loads where the source has adequate capacity or where automatic
selective load pickup and load shedding is provided as needed
to ensure adequate power to (1) the emergency circuits, (2) the
legally required standby circuits, and (3) the optional standby
circuits, in that order of priority. The alternate power source shall
be permitted to be used for peak load shaving, provided these
conditions are met.
Peak load shaving operation shall be permitted for satisfying
the test requirement of 700.3(B), provided all other conditions
of 700.3 are met.
A portable or temporary alternate source shall be available
whenever the emergency generator is out of service for major
maintenance or repair.
Where a generator is used for peak load shaving, supplying
backup power, and other uses, priority loads must be properly
and reliably served. Selective load pickup and load shedding are
not required where the generator has the capacity to supply all
loads served.
If a generator is used for peak load shaving or in a cogeneration
system, the increase in wear and tear will likely result in an
increase in downtime for maintenance. Also, using the emergency
generator on a regular basis for nonemergency loads provides
assurance that the emergency generator will supply
emergency power when it is needed. The requirement for a portable
or temporary alternate source is intended to provide emergency
power when the generator set is out of service for major
maintenance. A major maintenance or repair procedure is one
that keeps
 
I don't have a code book in front of me at the moment but your answer is in 702 for manual transfer switching, article 700 is not what your looking at.

Roger
 
See 702.4(B).

Automatic transfer applications the generator must be able to handle the connected load - load managing provisions can be used to limit the load to acceptable levels.

Manual transfer applications the user is able to select loads.
 
Not only is it not against code, it is required with a manual transfer for customers to manage their own loads. Worst they will do with a properly installed interlock is overload and shut down a portable generator.
 
JFletcher said:
Not only is it not against code, it is required with a manual transfer for customers to manage their own loads. Worst they will do with a properly installed interlock is overload and shut down a portable generator.
Click to expand...

Ditto. HO picks the loads for MTS or interlock applications.
 
Last 3 answers were right on the $$$. HO is permitted to manage his/her own loads on a manual transfer of a generator. The minute you insert the word "automatic" you're in a different category (also a different $$$ level).
 
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