the frequency requirements. When selecting a site to setup a generator, keep in mind that the noise level of thegenerator may present a problem in low-noise level orquiet areas.For example, the operating 100-kWgenerator presents a noise hazard that exceeds theallowable limits for unprotected personnel in theimmediate area; therefore, all personnel in theimmediate area must wear single- or double-hearingprotection.Other factors to consider when selecting a site to setup a generator are as follows:1. Placing a generator near points of large demandreduces the size of the wire required, holds the line loss(voltage) to a minimum, and provides adequate voltagecontrol at the remote ends of the line.2. The generator must be placed on a stable,preferably level, foundation. It should NOT be operatedon an incline of more than 15 degrees from level.3. In an area where the ground is soft, stabilize thefoundation with wood planking, sand bags, or othermaterials to provide a firm foundation for the generator.Although generators are designed to be operatedoutdoors, prolonged exposure to wind, rain, and otheradverse conditions will shorten their lives. Whengenerators are to remain on site for any extended periodof time, they should be mounted on solid-concretefoundations and installed under some type of shelter.GroundingThe generator set must be connected to a suitableground before operation.WARNINGElectrical faults in the generator, load lines,or load equipment can cause injury orelectrocution from contact with an ungroundedgenerator.Various types of grounding systems are used, suchas an underground metallic water piping system (fig.14-29, view A), a driven-metal rod (fig. 14-29, view B),or a buried metal plate (fig. 14-29, view C). A groundrod must have a minimum diameter of 5/8 inch if solidand 3/4 inch if pipe. The ground rod must be driven toa minimum depth of 8 feet. A ground plate must have aminimum area of 2 square feet and, where practical, beembedded below the permanent moisture level.NOTE: The ground rod is accountable collateralgear for a generator.Figure 14-29.—Methods of grounding generators.The ground lead must be at least No. 8 AWG(American Wire Gauge) copper wire. The lead is boltedor clamped to the rod, plate, or piping system. The other14-25
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business