Vertiv
™
| Liebert
®
EXM
™
MBC Installation Manual |
11
The following are guidelines only and are superseded by local regulations and codes of practice
where applicable.
• Take special care when determining the size of the neutral cable, because current circulating on the neutral
cable may be greater than nominal current in the case of non-linear loads.
• The ground conductor should be sized according to local or NEC codes, cable lengths, type of protection,
etc. The ground cable connecting the UPS to the main ground system must follow the most direct route
possible.
• Consideration should be given to the use of smaller, paralleled cables for heavy currents, as a way to ease
installation.
• In most installations, the load equipment is connected to a distribution network of individually protected
busbars fed by the Liebert EXM MBC output rather than being connected directly to the Liebert
EXM MBC
itself. Where this is the case, the Liebert EXM MBC output cables can be rated to suit the individual
distribution network demands rather than being fully load-rated.
• When laying the power cables, do not form coils to avoid increasing formation of electromagnetic
interference.
