6-4 Site Preparation
6 Power Requirements
Power Drop
• A dedicated power drop must be provided for the system due to its high current
requirements.
• Copper wire must be used for the power drop.
• An electrician must determine the wire size for the power drop. The wires must
be sized to ensure that the voltage at the system does not drop below
90 percent of nominal (see Calculating the Minimum Voltage below).
Calculating the Minimum Voltage
The voltage at the system must be at least 90 percent of nominal. To calculate the
minimum rms voltage multiply the rms voltage by 0.9. To calculate the minimum
peak voltage, multiply the rms voltage by 0.9 and then 1.414. For example:
208 volts rms * 0.9 * 1.414 = 265 volts peak
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