The Maximum Number of Disconnects for a Single PV System

Each PV system disconnecting means shall consist of not more than six switches or six sets of circuit breakers. Each device shall be marked with the following words or equivalent Warning electric shock hazard Terminals on the line and load sides may be energized in the open position this warning sign or labels shall comply with one tin Dot 21 B little commentary from Sean here most of the time you don't need this sign where it says line and load energized  in the open position because a lot of times the PV system disconnect is an AC circuit breaker or an AC disconnect.