How do I connect the HP LaserJet Pro M14-M17 to a grounded power outlet safely?
Connect the power cord between the printer and a grounded AC outlet, then turn on the printer. You must verify that the power source matches the voltage rating shown on the printer label, which is either 100-127 Vac or 220-240 Vac at 50/60 Hz. Only use the power cord supplied with the printer to avoid damage.
From the official HP Laserjet Pro M14 M17 Printer manual, page 2
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