The two module, double pole RCDs provide earth fault current protection for residential and light commercial applications.Available in 40, 63, 80 & 100A with 30mA sensitivity.These devices are an A type device offering Earth leakage protection on installations with an AC alternating current and equipment which produces a pulsed DC output current.All RCDs have a positive contact status indicator,I.e. when green window is visible this indicates that there is a 4mm contact gap. · · · Stylish modern profile, matches all other BG devices · · Positive contact status indicator · · Available in 40, 63, 80 & 100A with 30mA sensitivity · · Resistant to current surges, unwanted tripping excluded