Cooper Bussmann 858 - Manual (Page 13)

DOCUMENT 1025
REV. H
Instruction Manual
AGS-LED
858 LED Series
Sizes 1, 2, 3, 4 and 5
4
d. The concrete foundation/pad should be not more than 1 inch above grade in order to maintain the 3
inch maximum overall height above grade to the point of frangibility per FAA Engineering Brief no.
79. See the Engineering Brief for acceptable grading around the foundation/pad. The foundation/pad
pad must be level.
e. It is recommended that the contractor who is to install the concrete foundation/pad use cast in place
anchor bolts. The threaded portion of the anchor bolts should be 1-5/8 inches minimum to 1-7/8
maximum above the top of the concrete foundation/pad (See Figures 12, 12a-12c). This requires that
the anchor bolts be installed accurately as shown in the concrete foundation/pad dimensions Figure
13. The clearance holes on the floor flange are 5/8 inch diameter on a 4.75 inch diameter bolt circle
for use with ½ inch anchor bolts.
f. The concrete foundation/pad should include the series isolation transformer housing. It is
recommended that this housing not be placed under the sign power leg to allow access to the series
isolation transformer and connections for ease of troubleshooting and servicing (See Figures 12, 12a-
12c). This housing would be on the side closest to the Taxiway or Runway. A 2 inch conduit elbow
with threaded coupling attached at sign end would exit from the transformer housing side to the
foundation/pad and be flush with the with the top of the concrete foundation/pad grade level centered
between the floor flange bolts nearest the Taxiway or Runway side of the sign. The sign as viewed
will have the circuit card box to the right on the “A” side of the sign, which is closest to the Taxiway
or Runway side of the sign. If the location requires an additional housing to accommodate multiple
messages, then the separation distance between these signs housings can be 3 inches minimum to 12
inches maximum (FAA AC 150-5345-44J 3.2.5.2 a.). This first sign body housing (farthest from the
adjacent Taxiway) will have the circuit card box to the left on the “A” side of the sign. The sign side
identification is important with regards to its sign panel legend. A grounding rod and clamp should
be installed at the end opposite the circuit card box in order to ground the sign housing. This
grounding rod must not be connected to the field counterpoise.
DANGER:
DANGER Lock out electrical power to the series loop that will power the sign at
its source before attempting any electrical connections/splices.
g. Make electrical connections to the series loop power using L-823 Primary Connector Kits. Attach
the primary connectors to the appropriate size L-830 Series Isolation Transformer (See Tables 3-8).
These primary connections (single pin plug or receptacle) should have Heat Shrink Kits applied over
their connections to prevent disconnection and water from entering the cables. If two Series Isolation
Transformers are required to be attached in series to obtain the correct wattage required for the sign,
all primary lead connections should have Heat Shrink Kits applied. Two Series Isolation
Transformers connected in series together will require a Consolidating Harness (Crouse-Hinds Part
Number 26811-27) at the transformer secondary connectors (two pin receptacle) to series them
together. Use electrical tape around the connections to prevent accidental disconnection. The Series