Connecting a standard single-pole dimmer switch requires matching specific circuit conductors. The green or bare copper ground wire connects securely to the green grounding screw on the dimmer housing. The black hot wire coming directly from the main electrical breaker panel attaches to one of the dimmer's black leads (or line terminal). The remaining black load wire (or red traveler wire depending on the model) connects to the wire lead leading outward to the light fixture. Verification: Test all wire nut connections with a firm pull test, wrap the switch body with electrical tape, and restore breaker power to confirm smooth dimming operation.
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