![]() So the split results in the following breakdown. All the 250V receptacles connect between L1 and L2, but for the 125V receptacles, half are put on L1 and the other half on L2. The demand load is based on the number of receptacles, so distribute the receptacles equally on each line to determine the connected load per line. What’s the demand load for a 120/240V, single-phase service required for a marina with twenty 30A, 250V receptacles and twenty 20A, 125V receptacles ( Fig. It’s helpful to look at an example problem. Demand factors for receptacles that supply shore power for boats are outlined in Table 555.12 of the 2014 NEC. The receptacles must also be balanced between the phases to determine the number of receptacles on any given line. Table 555.12 demand factors are based on the number of receptacles on the feeder. The NEC permits a demand factor for the marina receptacle outlets that provide shore power for boats. The demand factors must change to make sense for the application. As you can imagine, the usage is very different. If you were to watch daily operations at a marina, you’d see why its demand factors differ from those for, say, hotel rooms. Let’s use some examples to show yet another difference in demand factors. In Part 1, we looked at specific types of commercial loads. ![]()
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