Electrical Diagnoses

Preventive electrical maintenance is also generally part of a building’s upkeep. If there are specific areas of concern in a building’s electrical system, Milton Electric may use specialized testing methods and equipment to isolate the problem.

The Health Check Survey consists of three distinct services. These services are an electrical system evaluation, power quality services, and electrical system maintenance that meets and exceeds the NFPA (National Fire Protection Association) 70B titled Electrical Equipment Maintenance, NETA (InterNational Electrical Testing Association) Maintenance Testing Guidelines, and IEEE (Institute of Electrical and Electronics Engineers) standards.

Verification, inspection, and testing of the electrical system that begins at the electrical service entrance and continues on to the equipment receptacles. The testing process covers the earthing system, electrical service grounding and bonding methods, electrical distribution system, a percentage of the facility receptacles, and infra-red thermography inspection of the electrical equipment. The verification, inspection, and testing process examines the electrical system from the stand point of the NEC (National Electrical Code), IEEE Std. 142 titled Grounding of Industrial and Commercial Power Systems, IEEE Std. 1100 titled Powering and Grounding Sensitive Electronic Equipment, OSHA personal safety requirements, NFPA 70E titled Standard for Electrical Safety Requirements for Employee Workplaces, and accepted industry testing and specifications standards.

Power quality monitoring is performed using a graphic power line data acquisition instrument for recording and analyzing electrical system operation. Some of the information recorded is voltage quality, harmonics, power anomalies, and power system efficiencies. The recorded information is used to determine if the quality of power is within an acceptable range as compared to electric utility standards, EPAct (National Energy Policy Act of 1992), IEEE Std. 1100, IEEE Std. 1159 titled Practice for Monitoring Electric Power Quality, IEEE Std. 519 titled Practices and Requirements for Harmonic Control in Electrical Power Systems, and accepted industry specification standards. Electrical system maintenance is performed for all critical paths (e.g. sensitive electronic equipment such as computer equipment, PC’s, workstations LAN/WAN equipment /systems, POS, and telecommunication equipment) and any problem areas as identified from the infra-red thermography inspection.

Diagnoses Checklist

  • Review past maintenance records to find repair patterns. These records may point to certain components that should be closely inspected during performance of preventive maintenance.
  • Inspect Secondary Electrical Distribution Equipment:
  • Inspect to ensure that warning signs exist. Replace as required
  • Inspect enclosures for damage, unauthorized openings, and corrosion of metallic objects. Repair and paint as required.
  • Inspect air passages and remove any blockage.
  • Inspect, investigate, and solve conditions for unusual odors.
  • As equipment is operated and tested, listen, investigate, and solve conditions for unusual noises.
  • Inspect electrical connections for degradation and tightness. Repair as required.
  • Inspect electrical insulation for discoloration and degradation. Repair as required.
  • Torque all electrical connections to design value..
  • Inspect equipment grounding components such as conductors and connections. Repair as required.
  • Inspect insulators for damage. Replace as required.
  • Inspect liquid immersed equipment for leaks and damage.
  • Inspect indicating lights for correct illumination.
  • Remove debris, dirt, and other foreign objects from all components, housings, cabinets, panels, etc.
  • Verify operation of space heaters and control thermostat. Check thermostat set point for proper setting.
  • Verify the grounding of the equipment and associated neutral where applicable.
  • Conduct infrared test on all main current carrying equipment for hot spots that may indicate overload conditions or loose connections.