Phoenix Contact 3044801 To determine current and voltage, the type of plug used is crucial, as indicated by the terminal block disconnection. Test sockets with screws allow for easy insertion of test plugs, allowing users to measure up to 500V nominal voltage and 30A nominal current through a screw connection method. The rated cross-sectional area is 4mm², while actual cross-sections range from 0.14mm² to 6mm². Additionally, the disconnect zone features mounting options NS 35/7.5 and NS 35/15, with gray coloration.