8‑pin and 11‑pin relay bases are common in control panels

8‑pin and 11‑pin relay bases are common in control panels, but miswiring coil and contact terminals can burn a load or keep a circuit from switching. This guide explains each pin function, shows practical wiring logic for NO/NC contacts, and compares 8‑pin DPDT sockets with 11‑pin 3PDT sockets for automation…