the LC 5211 City Class Crane requires only on operator because of it compact size and low maintenance requirements. Back to top When is a Luffing jib Tower Crane used? Luffing jib...What are the power requirements... This page is updated with your questions. Send us an email to inquiries@juliancrane.com ||Tower Cranes What are the power requirements... of a Linden Comansa Tower Crane? The tower crane requires 480V, 3 phase, 60 Hz, 100 amp to 400 amp circuit breaker depending on the size of the crane. Back to top What size crane do I need...