2
Power Supply Installation
2
Connect the AC line to the black
(line) and white (neutral) input
wires of the power supply using
suitable wire connectors.
Connect the supply wire that is
attached to the Tetra LED System to
the red (+) and black (-) output wires
of the power supply as outlined in
the “Electrical Connections” section
of your LED system’s Installation
Instructions.
3
Input
wires
White (neutral)
Black (line)
AC line
To Tetra LED System
Output
wires
Red (+)
Black (-)
NOTE:
For CSA approval, a disconnect/toggle switch of appropriate rating needs to be placed within 29.5 ft. (9 m) of primary side
of the power supply. The minimum rating of the switch must be either 120 or 220 Volts AC. The switch must also support twice the
amount of input current.
NOTE:
When installing power supply, connect to the appropriate sized building breaker or disconnect device for line and neutral
connections, in accordance with local, state or country regulations.
NOTE:
The grounding and bonding of the power supply and overall sign shall be done in accordance with National Electric Code
(NEC) Article 600.
Retrofit Instructions
1. (Existing Signs Only) Prior to installation, survey the site for information regarding power and accessibility inside and outside the
building. Ensure that the branch circuit supplying the existing transformer or ballast will be within the voltage ratings of the new LED
power supply, and have a current rating not exceeding 20A, or that permitted by applicable local, state, or country electrical codes
(whichever is less).
2. (Existing Signs Only) Remove the existing lighting equipment to be replaced, such as neon tubing or fluorescent tubes; and
associated transformers and ballasts. Care should be taken not to break the existing neon or fluorescent tubes. NOTE: Follow all
federal and local regulations when disposing of neon tubing, fluorescent tubes, transformers and ballasts.
3. (Existing Signs Only) If removal of the existing lighting equipment eliminates the disconnect switch, as required by applicable local,
state, or country electrical codes; a new disconnect switch must be installed.
4. (Existing Signs Only) Make sure the removal of lighting equipment does not compromise the integrity of the sign body (i.e. water
intrusion). Fill in all holes 0.5 in. (13 mm) or smaller with the appropriate amount of rated caulk or sealant. For holes greater than
0.5 in. (13 mm), use an aluminum or zinc coated steel patch with rivets and sealant.
5. Using the layout guidelines within the LED module installation instructions, determine required number of LED modules required to
illuminate the sign.
6. Using the applicable LED module maximum Loading chart, determine the number of Tetra Class 2 Power Supplies required to power
the number of LED modules required to illuminate the sign, so as not to overload any single power supply output.
7. Follow the LED module instructions to properly mount the LED modules.
8. Connect the DC output of the power supply to the LED modules using the Power Supply Installation instructions above.
9. Connect the power unit to the supply in accordance with the applicable local, state, and country electrical codes, and the Power
Supply Installation instructions above.
10. If required, the disconnect switch shall be installed by qualified personnel, in accordance with applicable local, state, and country
electrical codes.
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Mount the power supply. Mounting
the power supply base directly to
a thermally conductive installation
surface can improve thermal
performance.
NOTE:
All electrical connections
should be suitably protected from
mechanical damage and the
environment. Seal all connections
exposed to water with electrical
grade self-hardening silicone.
WARNING
RISK OF ELECTRIC SHOCK
AC input connections shall be
suitably enclosed.
