RV site demand factor

[snap1]

In the nec 551.73c If I have a pedestal that has 2 30 amp 125 plugs and one 20 amp gfci, is that considered 1 or 2? Then do you divide your total watts by 120 volt or 240? To get the correct service size???

 

[ceb58]

In the nec 551.73c If I have a pedestal that has 2 30 amp 125 plugs and one 20 amp gfci, is that considered 1 or 2? Then do you divide your total watts by 120 volt or 240? To get the correct service size???

551.72 states you can supply the pedestal with 120v sp power.
551.73 gives the demand. For your application it is 3600 va
3600/120= 30amp for 1 pedestal. You would need the # of pedestals to find the demand factor in table 551.73
You also need to look at 551.73 D Your feeders can not have an ampacity of less than 30amp

 

[Smart $]

In the nec 551.73c If I have a pedestal that has 2 30 amp 125 plugs and one 20 amp gfci, is that considered 1 or 2? ...

Note highlighted text...

551.73 Calculated Load.

(A) Basis of Calculations. Electrical services and feeders
shall be calculated on the basis of not less than 9600 voltamperes
per site equipped with 50-ampere, 208Y/120 or
120/240-volt supply facilities; 3600 volt-amperes per site
equipped with both 20-ampere and 30-ampere supply facilities;
2400 volt-amperes per site equipped with only 20-
ampere supply facilities; and 600 volt-amperes per site
equipped with only 20-ampere supply facilities that are
dedicated to tent sites. The demand factors set forth in
Table 551.73 shall be the minimum allowable demand factors
that shall be permitted in calculating load for service
and feeders. Where the electrical supply for a recreational
vehicle site has more than one receptacle, the calculated
load shall be calculated only for the highest rated receptacle.

Where the electrical supply is in a location that serves
two recreational vehicles, the equipment for both sites shall
comply with 551.77 and the calculated load shall only be
computed for the two receptacles with the highest rating.