While 220.84 is specifically for multi-family dwelling units, the principles behind it can be applied to hotels/motels, with some significant adjustments and caveats. It's not a direct substitute, but a framework. Here's a breakdown of why and how

Why 220.84 is Attractive for Hotels/Motels (and the problems with direct application):
Demand Factor Consideration

Hotels/motels, like multi-family dwellings, have diverse load patterns. Not all rooms/units will be drawing peak power simultaneously. 220.84's demand factors acknowledge this.

Simplified Calculation

Compared to a purely VA/sq ft calculation, 220.84 can, potentially, result in a lower calculated load, saving on service size and equipment costs.

Why You Can't Directly Use 220.84 for Hotels/Motels



Code Intended Use

220.84 is explicitly for dwelling units in multi-family buildings. The NEC is very specific in its definitions. A hotel room is not a dwelling unit under the code.

Load Differences

Hotel/motel units often have different load profiles than apartments. Consider: Higher AC load: Guests tend to run AC units constantly. Lower cooking load (often): Many rooms don't have full kitchens, and even in those that do, cooking is less frequent than in apartments. Additional Loads: Hallways, lobby lighting, elevators, pools, laundry facilities, commercial kitchens, restaurants, etc. in a hotel/motel building are not addressed by 220.84.

Inspection Issues

Inspectors are likely to reject a calculation based solely on 220.84 for a hotel/motel project. They'll rightly point out its intended scope.

How to Adapt the Principles of 220.84 (with Caution and Professional Judgement)


Start with Code Minimums (NEC 220.12 & 220.14)

Always calculate the load using the NEC's general lighting and small appliance VA/sq ft requirements for commercial occupancies, plus specific loads (AC, water heaters, etc.). This is your baseline.2.

Identify "Similar" Dwelling Units

Are the hotel rooms functionally equivalent to apartments (e.g., extended-stay suites with full kitchens)? If so, consider using 220.84 as a supplementary calculation. This is where professional engineering judgement comes in.3.

Adjust the 220.84 Calculation



8kW Electric Range

If the hotel rooms don't already have the range, including the 8kW is reasonable IF you are treating them similarly to the multifamily dwelling calculations.

Air Conditioning

Carefully consider the actual AC load. Hotel rooms are often smaller than apartments, but the AC usage might be higher. Use actual AC nameplate data where possible.

Diversity Factor on AC Load

Do NOT apply a diversity factor that is too aggressive on the AC load. Guests tend to run the AC when they are in the room.4.

Compare Calculations

Compare the result of the standard NEC method to the 220.84-based method (with adjustments). If the 220.84-based method yields a significantly lower result, be very cautious. Does it make practical sense?5.

Document Everything

Meticulously document your assumptions, justifications for using the 220.84-based approach, and how you adjusted it. Be prepared to defend your calculations.
6.

Engineering Judgement and Local AHJ

Consult with a licensed electrical engineer and the local Authority Having Jurisdiction (AHJ) before relying on a modified 220.84 calculation. Get their buy-in. They are the ultimate arbiters of code compliance.
7.

Consider Energy Management Systems

If you're using demand factors, consider an energy management system (EMS) to monitor and control loads. This provides real-world data to validate your calculations and helps manage peak demand. An EMS might also be required by the AHJ if you use aggressive demand factors.8.

Don't Forget Common Areas

220.84 completely ignores common area loads! Calculate the service load for lighting, corridors, laundry, elevators, pools, etc., separately using standard NEC methods.9.

Future Expansion

Plan for future load growth. Hotel/motel properties often add amenities or renovate. Over-sizing the service slightly can avoid costly upgrades later.

In summary:

You can't directly apply 220.84 to hotels/motels. It is code-specific to multi-family dwellings. However, the concept of demand factors can be useful. You must* modify the 220.84 calculation to account for the specific loads and usage patterns of a hotel/motel. Extensive documentation, professional engineering judgement, and AHJ approval are essential. If you're unsure, err on the side of caution and use the standard NEC calculation methods. Flag for review