During a fire pump test with an electric driver, which instrument is used to measure the electrical current?

During a fire pump test with an electric driver, which instrument is used to measure the electrical current?

• A. Amp meter
• B. Calibrator
• C. Hydrometer
• D. Pitot gauge

Answer: (A)

When testing a fire pump with an electric driver, you need to know how much current the motor is drawing to confirm it’s operating within its rated load and to spot overloads or underload conditions. The instrument used to measure electrical current in amperes is the ammeter. It can be wired in series with the motor circuit to read the current directly, or a clamp-on ammeter can measure current without breaking the circuit. The other devices aren’t meant for measuring current: a calibrator is for checking and adjusting instrument accuracy, a hydrometer measures liquid density, and a pitot gauge measures air velocity in ducts.

When testing a fire pump with an electric driver, you need to know how much current the motor is drawing to confirm it’s operating within its rated load and to spot overloads or underload conditions. The instrument used to measure electrical current in amperes is the ammeter. It can be wired in series with the motor circuit to read the current directly, or a clamp-on ammeter can measure current without breaking the circuit.

The other devices aren’t meant for measuring current: a calibrator is for checking and adjusting instrument accuracy, a hydrometer measures liquid density, and a pitot gauge measures air velocity in ducts.