Premium Leisure Sterling Leisure Owner's Manual page 11

Figure 4 – Electrical Service for XP1 and XP2 models
Single-phase 240V Domestic version
Use ONLY a Siemens 60A 240V three-wire plus ground GFCI
(PL part number 5547) with your XP1 or XP2 for proper operation.
See wire size chart on page 9.
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