Mike Dolt Enterprises
Mike Dolt Enterprises
User: Roach, Location: Newport, NC
Asked on: Tuesday, April 19, 2011 at 6:11 pm EDT
Answered on: Tuesday, May 14, 2024 at 4:25 am EDT
Question: Hi guys , I have a question please .I have a friend who needs to create a generator situation for when there is a power outage.It is for 3 different circuits , 2 of which are 30Amp 2-pole circuits for 2 seperate refrigerator units in a restuarant, the third circuit is for lights which is 20 amp single pole.My question is this He wants to supply the panel from a generator panel that will be fed from a protable gas powered generator.I need to know what size generator will be needed to accomplish this?Can someone please tell me how to calculate this properly.Thanks
Step 1: Determine the Total Amperage
First, add the amperage ratings of the three circuits: 30 Amp + 30 Amp + 20 Amp = 80 AmpStep 2: Calculate the Generator Size
To ensure the generator can handle the load, it should be rated for at least 125% of the total amperage. This provides a safety margin for peak loads. Generator Size = 1.25 * 80 Amp = 100 AmpStep 3: Consider Voltage and Phase
The generator must also match the voltage and phase of the electrical system being supplied. In most cases, this will be 240 volts, single-phase for residential and commercial properties.
Step 4: Generator Fuel Type
The generator should be fueled with a reliable and readily available fuel source, such as gasoline or diesel. Consider the cost, availability, and storage requirements of different fuel types.
Recommendation:
Based on the calculations above, a 100-amp generator with a voltage and phase that matches the electrical system is recommended. It's important to consult with a qualified electrician to ensure the proper installation and operation of the generator system. Flag for review