Electrical Burns
Electricity is both our friend and enemy. It is our friend if we are aware of its dangers and know how to handle it properly. When working with electricity, safety …
Compliance to NEC Standards and Requirements is not Compliance to NFPA 70E
Some employers assume that compliance to the standards and requirements of the National Electrical Code is as good as compliance to the NFPA 70E since both published by NFPA. It …
Safety Against Overvoltages
Overvoltages are unwanted potentials occurring in electrical systems between a phase conductor and the earth or ground, or between phase conductors having a peak value greater than the peak of …
Arc Flash Incident – 13.8 kV Indoor Switchgear Part II
Accumulation of moisture inside the 13.8 kV main bus and insulation tracking caused another arc-flash incident on the 13.8 kV Indoor Switchgear. An annual preventive maintenance was scheduled prior to …
Grounding and Bonding Permitted Methods
Grounding is one of the most taken for granted provision of the Philippine Electrical Code. The incompetence of Electrical Inspectors make this practice worst. I inspected the grounding system of …
Arc Flash – Hazard and System Grounding
IEEE 1584 Guide Equation for calculation of incident energy has a factor K2 for system grounding. It is zero for ungrounded and high or low resistance grounded systems and −0.113 …