Editing Guide to mapping (section)

=== APC ===
Each new room needs at least one, this will provide all the power for the room (magically). Each piece of machinery inside the APC's area will draw power from either the lighting, equipment or environmental channel.

Any room that is very equipment heavy (for example cargo bay) may need a beefed up APC (apc/highcap) to prevent early blackouts. These start with higher capacity power cells.