i.e., original equipment manufacturers (OEMs), and specialty panel shops
now provide a wide variety of low-voltage switchgear designs, some of them
very custom, to suit the user’s needs. These may or may not be Underwriters
Laboratory (UL)-labeled. It is common to fi nd installations where several
different kinds of circuit breakers, automatic controls, and monitoring devices,
and even automatic transfer switches, will be combined in the same line-up.