Socket-Polarity-Tester-with-RCD-Test-Function-Faithfull-EM908-p-The-Faithfull-Socket-Tester-is-an-essential-mains-safety-tester-designed-for-testing-socket-wiring-&-RCDs-It-will-determine-whether-a-socket-is-wired-correctly-or-incorrectly-Used-in-conjunction-with-the-coding-table-provided-the-5-combined-indicators-show-the-true-status-of-the-sockets-wiring-condition-It-provides-a-true-ground-error-indication-through-the-LCD-if-dangerous-contact-voltage-is-present-at-the-protective-eart