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11. Engine running time meter. 12. Voltage adjust rheostat, +/- 5% range. 13. A dual redundant set of lights shall be installed to illuminate all gauges, meters, and controls on the instrument panel. These lights shall be powered by the engine batteries 1 and activated with a switch located on the control panel. 2.6 ACCESSORIES A. The following engine generator accessories shall be provided and installed 1. Noise Reduction Attachments: These shall consist of a critical-rated exhaust silencer vibration isolators. The noise emitted by the engine generator exhaust silencer shall be limited to 85 dba as measured at 10 feet from any edge of the engine/generator. ' 2. Exhaust Silencer: A critical type silencer including flexible stainless steel exhaust piping &fittings properly sized and installed according to the manufacturer's recommendation. The silencer shall be coated to be temperature and rust resistant. Gasproof, seamless, stainless steel, flexible exhaust connector(s) ending in pipe thread or SAE flange shall be used. 3. Weatherproof Enclosure: This outdoor enclosure shall house the engine, generator, control&instrument panel, and all accessories. The enclosure shall have 14 to 18 gauge construction. All metal surfaces shall be painted with rust inhibiting primer and an exterior coat of enamel. The side and rear panels shall be hinged and removable for easy servicing. All panels shall have lockable latches to prevent tampering and unauthorized entry.Louvers shall be provided at generator and radiator ends to provide ample air flow to insure proper cooling, without having to remove or vent side panels. All servicable ' parts or devices in the enclosure shall be accessible when the access doors of the unit are open. ' 4. Exhaust Stack Pipe: An exhaust stack pipe and rain cap to connect to the engine exhaust silencer. The silencer, stack, and exhaust piping shall be sized to insure that measured exhaust back pressure does not exceed the manufacturer's maximum limitation. 1 ENGINE GENERATOR ' 11500 - 15