This would be the connection at a branch circuit. Power Recorder Power Type Diagrams SD ETHERNET POWER 1750 POWER RECORDER ON BUSY LINK 100-240 V 47-63Hz BA C N VOLTAGE CURRENT A/L1 NGND B/L2 azd03f.eps Figure 6. One-Phase Split Phase Example: A North American residential installation at the service entrance. Operators Manual SD ETHERNET POWER 1750 POWER RECORDER ON BUSY LINK 100-240 V 47-63Hz BA C N VOLTAGE CURRENT B/L2 A/L1 C/L3 NGNDSource GND OC/L3 OA/L1 OB/L2 azd04f.eps Figure 7. Three-Phase