Electrical power testing devices ensure power systems and equipment operate reliably and safely, and reduce maintenance downtime. Multimeters use test leads to measure voltage, current, and resistance in circuits, components, wall outlets, and other electrical devices and are ideal for field service work. Clamp meters fasten around or surround conductors to measure electrical current in live circuits to test and troubleshoot electrical equipment. Test leads and test probes connect electrical testing equipment to the testing object to provide safe and accurate test results. Resistance Testers measure the resistance of electrical equipment to identify faults like current leakage or insulation, or verify a suitable grounding source. High-voltage testers measure and monitor high voltage equipment to make sure current flow is at the correct levels.