NCCER Electrical 2 Module 9 Test Questions and Correct Answers

A ground fault is described as an unintentional electrically conducting connection between an ungrounded conductor of an electrical circuit and a normally non current carrying conductor Where a main bonding jumper is required by NEC, the main bonding jumper cannot be less than what percentage 12.5% A ground test utilizing an auxiliary electrode and an auxiliary potential electrode is known as 3 point test If single gain nail on non metallic boxes are used with NM cable which of the following is true, plastic box dont have to Ground it no connection to the box is required The fall of potential method is used to measure what Earths resistance Rod, pipe, and plate electrodes must have a reistance to ground of at least 25ohms In a separately derived system the equipment bonding jumper connects to the system housing to the Neutral bus bar Which type of system is required to be grounded AC system over 1kv that supplies mobile or portable equipment The size of an EGC Equipment Grounding Conductor is determined by what Size of Overcurrent protection device (Breaker) Which of the following is true when installing grounding at more than one building? The grounded circuit conductor and equipment grounding conductor must both be extended to the second building A transformer supplied system operating at less than 50v must be grounded is the supplied voltage to the transformer exceeds 150v To be effective, a grounding system must limit the voltage on the electrical system and protect it from under voltage conditions A short circuit is a conducting connection between Any conductors of an electrical system