Single-axis controllers Wiring Devices in the range 32 ... 104 A (15 ... 55 kW) 4 4.6 4.6.4 Design of the cables ƒ The cables used must comply with the approvals required for the location (e.g. UL). ƒ It is imperative to comply with the regulations concerning minimum cross-sections of PE conductors. The cross-section of the PE conductor must be at least as large as the cross-section of the power connections. ƒ The effectiveness of a shielded cable is reached by: – Providing a good shield connection through large-surface shield contact. – Using only braided shields with low shield resistance made of tin-plated or nickel-plated copper braid.
– Using braided shields with an overlap rate > 70 % and an overlap angle of 90 °. – Keeping unshielded cable ends as short as possible. Use system cables or shielded cables for these connections: ƒ Motor ƒ Motor holding brake (connected to optional motor brake control) ƒ Motor temperature monitoring ƒ External brake resistor ( Mounting Instructions of the brake resistor) The following connections need not be shielded: ƒ Mains ƒ DC bus 4.6-17 EDS94SPP101 EN 3.1-04/2007