The NFPA and IEEE recommend a ground resistance value of 5 ohms or less while the NEC has stated to “Make sure that system impedance to ground is less than 5 ohms specified in NEC 50. In facilities with sensitive equipment it should be 5ohms or less”.
IDHAL is an energetic and dynamic youth company located in Amman-Jordan with sister company and partner in USA, which specializes in developing and implementing integrated renewable energy business in Middle East region.