15 HP, 240V DC motor has a full-load current (FLA) of approximately 55 Amperes.
Based on common DC motor data (such as NEMA standard tables often used in Canada), a 15 HP, 240V DC motor has a full-load current (FLA) of approximately 55 Amperes. For protection using a non-time delay fuse in Canada, the maximum permitted size is generally 150% of the full-load motor current. Motor FLA: 55 AMax Fuse Rating: \(55\text{A}\times 1.50=82.5\text{A}\)Standard Fuse Size: The next standard fuse size up, which would typically be a 90A or 100A non-time delay fuse (such as Class K5 or H), although 80A might be used if the motor FLA is slightly lower.
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