Codes, electrical systems piping

If your electrical system is grounded in this way, it could increase the rate at which lead is dissolved by the water in your pipes and consequently your chances of lead contamination. Interpretation of the national electrical code varies from locality to locality in terms of the legal requirement for grounding electrical systems onto plumbing systems. In no case should you attempt to make any changes in your electrical system s grounding yourself any work related to this should be done only by a licensed electrician. 

Codes and standards applicable to SSCs shall be identified and their use shall be in accordance with their classification (see paras 6.12 and 6.13). In particular, if different codes and standards are used for different types of items (e.g. for piping and for electrical systems), consistency between them shall be demonstrated. 

Information about process equipment including materials of construction, electrical classification, relief systems, HVAC, design codes and standards, material and energy balances, safety systems, and piping and instrumentation diagrams (P lDs) must also be identified and assembled. 

Natural electrodes could include metal underground water pipe electrodes and concrete-encased electrodes. The NEC lists a metal underground water pipe, available on the premises, in direct contact with the earth for 10-ft or more, and electrically continuous as part of the grounding electrode system. The NEC also lists a concrete-encased electrode (meeting the detailed specifications listed in the code) as part of the grounding electrode system. The appHcation of concrete-encased electrodes is also covered in IEEE Std 142 [4]. 

The code includes many generic component models from which general systems can be simulated. The component models include pumps, valves, pipes, heat releasing or absorbing structures, reactor point kinetics, electric heaters, jet pumps, turbines, separators, accumulators, and control system components. In addition, special process models are included for effects such as form loss, flow at an abrupt area change, branching, choked flow, boron tracking, and non-condensable gas transport. 

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