PC105 3 Phase Industrial Socket Tester The PC105 is a 3 phase socket tester designed to quickly check for the presence of phase, phase sequence, neutral and PE in 5 pin, 16A, 32A and 63A sockets. This device includes a five-pin socket for connection to compatible sockets which is attached via a cable to the main body of the socket testerOnce it's connected up the device will evaluate phase presence, phase sequence, neutral and PE presence and display the results as coloured LED indicatorsThe device includes a handy guide on the front that shows the different possible LED indicationsL1, L2 and L3 are presentL1, L2 and L3 are missing, PE presentL1 errorL2 errorL3 errorPE errorN error