R016600x

Section I I - General Information

A fused disconnect switch (customer furnished) must be installed in accordance with NEC 430 and should be located within view of the steam generator. The switch should be easily accessible to operating personnel. Clayton provides a set of terminals in the steam generator electrical control cabinet for wiring an emergency stop device (customer furnished).

NOTE Additional access holes are located in the bottom of the electrical control cabinet(s). DO NOT make any holes in the sides or top of the electrical cabinet(s).

Clayton strongly recommends surge protection for all its equipment. Isolation transformers are rec- ommended for areas subject to electrical variations due to weather, weak or varying plant power, or old sys- tems. Isolation transformers are required on all electrical systems that are based on delta distribution sys- tems. Clayton recommends electrical connections be made through a grounded wire system only. Clayton electronics cabinet devices are rated to function properly at typical boiler room temperatures not exceeding 120° F (49° C). For boiler room installations where temperatures are expected to rise above 120° F (49° C), installation of a Clayton electronics cabinet cooler is required. This cooler requires a supply of clean, dry compressed air at 40 scfm (1.13 m 3 /min.) at 100 psi (6.9 bar). 2.14 Electrical Grounding Clayton’s steam generator, fluid heater, and water skid installations must have an electrical ground- ing network with a resistance no higher than 2 Ohms to earth ground when measured at its control box(es). Clayton requires a separate, direct earth ground at each of its unit installations. Grounding wires must be routed directly with electrical power supply wiring and sized according to the connected amperage, but never less than 8 awg. A separate ground wire must be run to each steam generator / fluid heater frame and water skid frame.

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08/11/2016

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