minimum design & construction standards - Martin County, Florida

panel's control circuitry, shut down the affected pump and send a signal to the RTU.
e) Pump Control Panel Housing
The pump control panel housing shall be a NEMA Type 12/3R with rain-shield and 3-point
padlockable latch, dead front enclosure, constructed of not less than 14 gauge #316
stainless steel. The minimum panel housing shall be 12" deep x 30" wide x 36" high. The
enclosure shall be equipped with an exterior door, interior “dead front” door and shall
incorporate a removable 1/8 inch thick aluminum back panel on which control components
shall be mounted. The front door shall be secured to the enclosure with a continuous
stainless steel piano hinge and be equipped with a padlocking three point latching
mechanism. The handle of the three point latching mechanism shall be fabricated of heavy
gauge stainless steel. The back panel shall be secured to the enclosure with collar studs.
f) Fastenings and duct work
All motor branch circuit breakers, motor starter contactors, overload relays, control
transformer and control relays shall be securely fastened to the removable back panel with
cadmium plated steel screws and lock washers. The back panel shall be tapped to accept
the component mounting screws. Self-tapping screws shall not be used to mount any
component.
g) Contactors and Switches
An open frame, across-the-line, NEMA rated, magnetic motor contactors with 120 volt, 60
Hz coils shall be furnished for each pump motor (Saftronics Model GP-10 VFDs shall be
supplied in approved single phase installations). Contacts and coil shall be easily
replaceable without removing the contactor from its mounted position. All operating
controls and instrument shall be securely mounted on the control compartment interior
door. All controls and instruments shall be clearly labeled using engraved plastic plates to
indicate function. Trouble light switch shall be NEMA 4.
h) Primary Disconnect
The primary disconnect shall be a re-settable primary circuit breaker located in the circuit
prior to the control panel. Amperage rating and stainless steel enclosure type to be
specified by Engineer. Lightning arresters and surge protectors shall be installed.
I) Interior
The following components shall be mounted on the interior door:
Access to Primary and Generator circuit breaker and interlock mechanism
Access to Pump and secondary breakers.
Trouble light On-Off switch.
“Run in Backup” indicator light.
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