220.54. As specifically stated in the first sentence of this section of the Code, “The load for household electric clothes dryers in a dwelling unit(s) shall be either 5,000W (volt-amperes) or the nameplate rating, whichever is larger, for each dryer served.”

## What is the demand factor for 9 household electric clothes dryer?

Table 220.54 Demand Factors for Household Electric Clothes Dryers

Number of Dryers | Demand Factor (%) |
---|---|

9 |
55 |

10 |
50 |

11 | 47 |

12—23 | 47% minus 1% for each dryer exceeding 11 |

## How many amps does a 220 volt dryer use?

The Laundry closets are installed with a 220/240V power outlet that provides **20 Amps** of power; this is intended for the dryer.

## Is a dryer a continuous load?

**Continuous Load**.

Note the words maximum current (not just ‘turned on’!) and expected. **Dryers** and stoves and water heaters have elements that turn on and off, even while running.

## How do you calculate service load?

**Index: Loads.** **Feeders, Calculations = Annex D**

- Go to annex D in your code book for reference. …
- Using your calculator multiply 2500 x 3 = 7500.
- Small appliance load = 3000.
- Laundry load = 1500.
- Using your calculator add 7500, 3000, 1500 = 12000 now subtract 3000 = 9000 now multiply by .35 = 3150 now add 3000 = 6150.

## How do you calculate electrical load?

Compare the wattage of your air conditioner and furnace. Since you only use one at a time, add only the larger wattage rating to your equation. **Divide the** resulting number of watts by volts (most homes use 220 volts) to get the number of amps, or the electrical load.

## How do you calculate demand load?

The demand load is the sum of the operational load (including any tactical load) and nonoperational demand loads. It is determined by **applying the proper demand factor to each of the connected loads and a diversity factor to the sum total.**

## What is the maximum demand for a 14kW electric range?

The service demand load for one 14kW range is **8.8kW** (See Figure 1). Regardless of the number, the first note applies if all the ranges are rated the same and are more than 12kW.

## How do you calculate general lighting load?

General lighting and receptacle loads

Table 220.12 in the National Electrical Code considers a residence a listed occupancy at 3 VA per square foot; therefore, the general lighting load is determined **by multiplying the square footage**. For example, 2,800 square feet times 3 VA is 8,400 VA.

## What is the feeder demand for one 15kw range?

The demand loads shown in Column C are for appliances with ratings **12kW**, or less. The maximum load required for one 9kW range, when computing a service (or feeder), is 8kW.