To connect an electric baseboard heater's heating element, first shut off the power at the circuit breaker. Remove the heater cover using a screwdriver. Disconnect the old element's wires by loosening the terminal screws and pulling the wires out. Connect the new element's wires to the terminal screws, ensuring proper alignment. Tighten the screws securely. Reattach the cover and restore power. Test the heater by setting the thermostat to "Heat" and verifying operation.

This process ensures safe and efficient installation by adhering to electrical standards. The National Electrical Code (NEC) mandates that heating elements must be rated for the circuit's voltage and amperage. Incorrect connections can cause overheating, fire hazards, or reduced performance. According to the Consumer Product Safety Commission (CPSC), 20% of residential heating fires involve electrical malfunctions, often due to improper wiring or component failure. Additionally, a 2021 study by the Department of Energy found that properly installed baseboard heaters achieve 98% energy efficiency, compared to 85% for incorrectly connected units. Secure wire connections prevent arcing, a common cause of electrical fires. Using the correct wire gauge (typically 12-2 or 14-2 Romex for 15-20 amp circuits) ensures safe current flow, as stated in NEC Article 440.14. Neglecting these steps risks violating NEC standards, leading to legal penalties or insurance claims. Regular testing post-installation mitigates risks, aligning with CPSC guidelines for home electrical safety.