Electrical Inspection for Continuity Clause Samples

Electrical Inspection for Continuity. After the coating has been properly applied, the Contractor shall conduct an electrical inspection of all coated surfaces with an electrical holiday detector. Any defect in the coating shall be satisfactorily repaired at the expense of the Contractor . The electrical equipment used for holiday detection in the shop and in the field shall be a portable, low- amperage, adjustable-voltage pulse holiday detector that employs an audible signaling device. The holiday detector shall use coil spring electrode or a brush electrode. The primary input power shall be no higher than 20 ▇▇▇▇▇, and the minimum pulses at crest voltage shall be 20 Hz. The operating voltage of the detector shall be determined by the following formula: Where: V= 1,250 t0.5 V = the inspection voltage t = average coating system thickness in mils (1 mil = 25 microns) Because of variables, such as relative humidity and temperature, the detector voltage shall be checked no less than twice daily that is before starting work in the morning and before resuming work in the afternoon. To ensure proper inspection voltage the equipment shall be properly grounded and the voltage adjusted according to the instructions of the equipment manufacturer. After the voltage has been properly checked, the electrode shall be passed over the coated surface one time only, at a rate of approximately 9 to 18 m/min. If the electrode is stopped while passing over the coated surface, the current to the electrode should be cut off immediately to avoid possible damage to the coating.