Section 3 - Installing the Control3-29Panel Earth Ground ConnectionsIn order for the lightning transient protective devices inthis product to be effective, the designated earth groundterminal (terminal 30) must be terminated in a goodearth ground. Recommended wire gauge for the groundconnection is #16 AWG, run no farther than 30 feet.The following are examples of good earth groundsavailable at most installations:• Metal Cold Water Pipe: Use a noncorrosivemetal strap (copper is recommended) firmlysecured to the pipe to which the ground lead iselectrically connected and secured.• AC Power Outlet Ground: Available from 3-prong, 120VAC, power outlets only. To test theintegrity of the ground terminal, use a three-wirecircuit tester with neon lamp indicators, such asthe UL-Listed Ideal Model 61-035, or equivalent,available at most electrical supply stores.The panel requires the earth groundconnection for its lightning transient protectiondevices.Determining the Control’s Power Supply LoadUse the tables that follow to calculate the total currentfor the Auxiliary Power, the Alarm Output, and thePolling Loop. In each table, multiply each device’sstandby and/or alarm current by the number of unitsused.1. In Table 1, enter devices used on the polling loop.Calculate total current draw on the polling loop.Table 1: Total Polling Loop Current DrawPolling Loop Device Current # of Units TotalPolling Loop Subtotal(terminals 24 & 25 – 128mA) ✳✳The total current cannot exceed 128mA. If total load exceeds128mA, then a 4297 Loop Extender Module can be used. Thismodule is powered from the panel’s auxiliary power, andprovides a separate polling loop output, which can support anadditional 128mA load. Note that the total number of pointsconnected to the panel cannot exceed 119.2. In Table 2, enter devices used on Auxiliary Power.Calculate standby and alarm currents, then add toget Auxiliary Power current subtotal.Table 2: Auxiliary Power Current LoadTotal CurrentDeviceModel #Device Current X# of UnitsStandby AlarmAuxiliary Power Subtotal(terminals 6 & 7 – 750mA max.)
