Wiring Pump, Relay, and Controller for 220V Well Pump

Complete Wiring Guide: Goulds GT-15 Pump, Relay, Rain Bird ESP-LX

New well for irrigation (was city water). Uncle running 220V from panel. Need to connect pump, pump relay, and Rain Bird ESP-LX/LXI controller. Also: will well pump improve pressure on Rain Bird 5000 rotors that were weak on city water?

Wiring Procedure

1. 220V Power to Relay: From breaker panel to relay LINE terminals (L1, L2, Ground)
2. Relay to Pump: From relay LOAD terminals (T1, T2, Ground) to pump
3. Pump Internal Wiring: Follow Goulds GT-15 diagram for 220V connection
4. Low-Voltage Control: New sprinkler wire (red/white) from controller PUMP/MV and COMMON terminals to relay 24V coil terminals

Pressure Improvement

Yes, a properly sized well pump will significantly outperform city water for irrigation. City water typically 40-60 PSI with flow restrictions. A 1.5-2 HP submersible can deliver 60-80 PSI at 20-30 GPM — ideal for Rain Bird 5000 rotors (need 35-50 PSI at head). Nozzle changes likely unnecessary; just proper pump sizing.

Critical Safety

220V work requires licensed electrician. Pump relay must be rated for pump HP and voltage. Ground all equipment per NEC.