Arc Flash – Typical Causes & Equipment
- Accidental contact with energized parts – including dropped tools
- Dust and impurities – contamination on surfaces which can contain a path for current
- Inadequate short circuit ratings
- Improper work procedures – accidents by their very nature on not a planned event
- Water and vapor condensation – can cause tracking on the insulating surfaces
- Wiring errors and poor design
- Corrosion on wiring parts – can create impurities on insulating surfaces which may also provide a path for current
- Electrical Arc Flash – Typical Equipment
- Motor Control Centers (MCC’s)
- Circuit Breakers
- Disconnects
- Metering Devices (remove – install)
- Panel Boards
- Switchgear (low and high voltage)
- Transformers