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FES - Inspection Procedures
Component Evaluation
The following safety relevant components are inspected for suitability of electrical rating and NRTL (Nationally Recognized Testing Lab) listing.
| Circuit Breakers | Fuses |
| Push-buttons | Relays |
| Transformers | Interlocks |
| Internal Wiring | Interconnecting cords |
| Lasers |
Ground fault circuit interrupter - GFCI, (Residual current circuit breaker - RCCB) |
| Motors | Motor Contractors |
| Motor Overload | Lamps |
| Receptacles | Cables and Wires |
| Disconnect Switches | Emergency off switch (EMO) |
| Power Supplies | Heaters |
| Motor Controllers |
Construction evaluation
The equipment's design is visually inspected with particular attention to the following areas:
| Use of Listed Components | Proper Transformer protection |
| Proper conductor protection | Ground and bonding |
| Accessibility of live parts | Wiring methods |
| Environmental conditions | Guarding of Live Parts |
| Guarding of moving parts | Accessibility of moving parts |
| Sharp edges | Suitability of enclosures |
| Availability of suitable markings | Pinching, crushing, falling hazards |
| Damaged components | Suitability of material |
| Wiring ampacity | Proper wire bending spaces |
| Proper Motor protection |
Required Safety Testing:
In addition to relevant construction evaluations, the equipment will also be tested for compliance to safety requirements. The tests may vary depending on the type of equipment. However, some of the most common tests are:
Grounding Continuity Test:
Testing for proper grounding and bonding of the whole equipment.
Dielectric Voltage Withstand Test (Hi Pot Test):
Testing for adequate spacing between conductive parts. Test is performed between primary and ground and primary and secondary of the unit.
Input Current Test:
Measuring the input current of the unit during maximum load operation and evaluating the suitability of protection mechanisms such as fuses, circuit breakers, etc.
Strain Relief Test:
Measuring the strength and suitability of strain relief on cable and flexible conduits through push and pull tests.
Emergency Stop Test:
Test the proper operation of any emergency stops for reliability and proper functioning.
Rain Tests (for outdoor use equipment):
Equipment is exposed to simulated rain conditions for up to four hours. Following the test, the equipment is inspected for ingress of water and tested for dielectric breakdown and insulation resistance.
Interlock Test:
Tests the suitability and performance of all interlocks giving access to live parts and moving components.
