| Section 3 - Installing the Control |
Panel Earth Ground Connections |
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In order for the lightning transient protective devices in | • AC Power Outlet Ground: Available from 3- |
this product to be effective, the designated earth ground | prong, 120VAC, power outlets only. To test the |
terminal (terminal 30) must be terminated in a good | integrity of the ground terminal, use a |
earth ground. Recommended wire gauge for the ground | circuit tester with neon lamp indicators, such as |
connection is #16 AWG, run no farther than 30 feet. | the |
The following are examples of good earth grounds | available at most electrical supply stores. |
available at most installations: |
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•Metal Cold Water Pipe: Use a noncorrosive metal strap (copper is recommended) firmly secured to the pipe to which the ground lead is electrically connected and secured.
The panel requires the earth ground connection for its lightning transient protection devices.
Determining the Control’s Power Supply Load
Use the tables that follow to calculate the total current for the Auxiliary Power, the Alarm Output, and the Polling Loop. In each table, multiply each device’s standby and/or alarm current by the number of units used.
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 Draw
Polling Loop Device Current # of Units Total
2.In Table 2, enter devices used on Auxiliary Power. Calculate standby and alarm currents, then add to get Auxiliary Power current subtotal.
Table 2: Auxiliary Power Current Load
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| Total Current | ||
Device |
| Device Current X |
| Standby |
| Alarm | |
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| # of Units |
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Polling Loop Subtotal
(terminals 24 & 25 – 64mA) ✳
Auxiliary Power Subtotal
(terminals 6 & 7 – 750mA max.)
✳The total current cannot exceed 64mA. If total load exceeds 64mA, then a 4297 Loop Extender Module can be used. Note that the total number of points connected to the panel cannot exceed 55.
