・Single grounding wire → M1

・Single-phase 2-wire without PE (L/N) → M2

・Single-phase 2-wire with PE (L/N/PE) → M3 (for PE included)

・Single-phase 3-wire without PE (L1/L2/N), three-phase 3-wire without PE (R/S/T) → M3 (for PE not included)

・Single-phase 3-wire with PE (L1/L2/N/PE), three-phase 3-wire with PE (R/S/T/PE) → M4 (for PE included)

・Three-phase 4-wire without PE (R/S/T/N) → M4 (for PE not included)

・Three-phase 4-wire with PE (R/S/T/N/PE) → M5

Note: The expression “three-phase ○-wire” alone may cause misunderstanding.

　　　Please be sure to confirm the presence or absence of “neutral wire” and “PE (protective earth).”