Yes and no. IOW, it applies to both continuous and non-continuous. In my profound wisdom lol, I have rationalized factoring applies to the continuous portion first, i.e top down.For lighting loads subject to the demand factors in table 220.42, are these considered non-continuous loads?
For lighting loads subject to the demand factors in table 220.42, are these considered non-continuous loads?
Lighting basically everywhere but residential (dwelling, motel, dormitory) is considered a continuous load.
Examples: Schools, Offices, Retail, since it is very likely to be on more than 3 hours in a row.
Explain?Somehow it works out you can take a massive demand factor of .25 for anything over 120,000 VA.
Explain?
When service calculations are done to size service you are not going to multiply the answer by 125%. if your calculations equal say, 190amps then a 200 amp service will be sufficient for the structure.
What about for the purposes of circuit breaker and conductor sizing?
What about for the purposes of circuit breaker and conductor sizing?
That is correct... as far as calculations per Article 220.Your original question seems to deal with service calculations -- I was pointing out the calculation is the max amperage anticipated for the service therefore there is no more adjustments for continuous or non continouos loads needed
Not sure I can agree with what you said fully. It may be your wording. Its the remainder over 120K thats allowed to use the 25% demand factor. Don?t get your point either, as you can also use an additional demand of 35%?why pinpoint the 25% only.I mean if you assume that the lighting demand loads for feeders are non-continuous after application of the demand factors in table 220.42, it still manages to work (not have any problems) if you follow the table. For dwelling units, a general lighting load over 120,000 VA can apply a 25% demand factor to it.
Not sure I can agree with what you said fully. It may be your wording. Its the remainder over 120K thats allowed to use the 25% demand factor. Don?t get your point either, as you can also use an additional demand of 35%?why pinpoint the 25% only.
As I said earlier, load calculations under Article 220 make no consideration for continuous vs. non-continuous. Factoring loads at 125% falls under Articles 210, 215, 230, and other pertinent articles.I was highlighting the 25% for anything over 120,000 VA to indicate that the code assumes 75% of the load above 120,000 VA is considered to be off at any given moment. For the 25% of the lighting that is assumed to be on, I would assume this is considered a continuous load though.
This would affect equipment buss ratings too right? Even though a final calculated load is determined to be let?s say 1,180 A with demand, is this entire load considered non-continuous so that a 1,200 A main distribution board can be put in or would the rating need to be higher to account for the continuous loads?
I was highlighting the 25% for anything over 120,000 VA to indicate that the code assumes 75% of the load above 120,000 VA is considered to be off at any given moment. For the 25% of the lighting that is assumed to be on, I would assume this is considered a continuous load though.
This would affect equipment buss ratings too right? Even though a final calculated load is determined to be let?s say 1,180 A with demand, is this entire load considered non-continuous so that a 1,200 A main distribution board can be put in or would the rating need to be higher to account for the continuous loads?