Explain why heating elements in water heaters are frequently rated 250 volts for operation on 240-volt circuits.
What will be an ideal response?
To help reduce the premature burnout of heating elements, some manufacturers will supply 250-volt heating elements, yet will mark the nameplate 240 volts, with its corresponding wattage at 240 volts. This allows a safety factor if slightly higher than normal voltages are experienced.
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Which of the following is usually outlined and left blank?
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