about how many amps does a large shopping mall use?
2007-12-04 13:27:26 · 2 answers · asked by Alex 3 in Science & Mathematics ➔ Engineering
The actual load of a commercial customer is substantially less than the size of their main switch. Usually far less than 50%.
It is hard to define a "large shopping mall", so here are some numbers that will put things into perspective.
A 120,000 ft² retail store (ex. Walmart, Target, etc) has a peak summer demand of around 500-600 kW. More for a Supercenter.
A slightly smaller retail store (ex. Kohl's) is probably around 250 kW.
Small stores in the mall are in the 30-50 kW range.
A 70,000 ft² grocery store will have a peak summer demand of around 700-800 kW.
A large shopping mall with multiple anchor tenants might be in the range of 3 to 4 MW. (3000 to 4000 kW)
Malls generally take electric service at 277/480 3-phase. Assuming a power factor of 0.90, you can convert kW to amps, with the following formula.
kW ÷ 0.90 ÷ .480 kV ÷ √3 = amps
Simplified: kW ÷ 0.747 = amps
>>>>>>>>>>> UPDATE <<<<<<<<<<<
I obtained some actual loads on a 4,000,000 ft² shopping mall served with a spot network. The summer peak load for the entire mall is 13,700 kW. That works out to around 3½ watts per ft².
>>>>>>>>>>> UPDATE <<<<<<<<<<<
2007-12-04 15:32:17 · answer #1 · answered by Thomas C 6 · 2⤊ 0⤋
Roughly the average mall will have a 2000amp service ...This may be in the form of a combination of service drops ranging in size from 225amps to 400amps the most common voltage at the amperage is a 480/277 3phase 4 wire wye.....120 volt power is aquired from transformers within the system.....from the E...
2007-12-04 13:40:28 · answer #2 · answered by Edesigner 6 · 1⤊ 0⤋