1. The protective devices (interlocks) shall not be bypassed unless by qualified electrical personnel when inspecting, adjusting, or working on the equipment. Proper procedures need to be followed when bypassing interlocks.

2. Procedures should be established for tagging the interlock and logging its location and the time when bypassed and restored. Written approval shall be obtained from an appropriate authority before bypassing an interlock .

3. Only qualified electrical personnel (those trained in the proper handling and storage of power capacitors and hazard recognition) shall be assigned the task of servicing/installing such units.

4. Proper PPE shall be used when working with capacitors.

5. Access to capacitor areas shall be restricted until all capacitors have been discharged, shorted, and grounded.

6. Any residual charge from capacitors shall be removed by grounding the terminals before servicing or removal.

7. Automatic discharge and grounding devices should not be relied upon.

8. Grounding hooks shall be inspected before each use.

9. Capacitor cases should be considered "charged." 10. Protective devices should be tested periodically. 11. All uninstalled capacitors capable of storing 5 J or greater shall be short circuited with a

conductor no smaller than #14 AWG.

12. A capacitor that develops an internal open circuit may retain substantial charge internally even though the terminals are short-circuited. Such a capacitor can be hazardous to transport, because the damaged internal wiring may reconnect and discharge the capacitor through the short-circuiting wires. Any capacitor that shows a significant change in capacitance after a

fault may have this problem. Action should be taken to minimize this hazard when it is discovered.

10.10.2 INDUCTORS

This section covers inductors as well as electromagnets and coils that are used in the following typical applications:

1. Energy storage

2. Inductors used as impedance devices in a pulsed system with capacitors

3. Electromagnets and coils that produce magnetic fields to guide or confine charged particles

4. Inductors used in do power supplies

5. Nuclear Magnetic Resonance (NMR), Electron Paramagnetic Resonance (EPR), and Magnetic Susceptibility Systems.

10.10.2.1 HAZARDS

Examples of Inductor hazards include:

1. Overheating due to overloads, insufficient cooling, or failure of the cooling system could cause damage to the inductor and possible rupture of the cooling system.

2. Electromagnets and superconductive magnets may produce large external force fields that may affect the proper operation of the protective instrumentation and controls.

3. Magnetic fields could attract nearby magnetic material, including tools and surgical implants, causing injury or damage by impact.

4. Whenever a magnet is suddenly de-energized, production of large eddy currents in adjacent conductive material can cause excessive heating and hazardous voltages. This state may cause the release or ejection of magnetic objects.

5. The worker should be cognizant of potential health hazards.

6. Interruption of current in a magnet can cause uncontrolled release of stored energy. Engineered safety systems may be required to safely dissipate stored energy. Large amounts of stored energy can be released in the event of a "quench" in a superconducting magnet.