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Interlocked Reefer Power Outlets

Engineering Specifications 1.0SCOPE

Contact Sleeves Environmental Seals Circuit Protection High Inrush Current Protection Requirements – Quad-slit brass contact sleeves shall havecontact pressure springs of electromotively similar material to maintain consistent contact pressure between sleeves and mating male pins and prevent galvanic corrosion.2.9 – Each interlocked receptacle must beprotected by a molded cased, thermal-magnetic type, UL 489 listed circuit breaker. The circuit breaker must also comply with NEC Articles 240 and 430 for branch circuit protection.2.10a – Each device must have anenvironmental seal or O-ring around all interiors and around each sleeve to prevent water and contaminants from entering the wiring compartment. The seals shall provide waterproof capability if plug or screw cap are removed.2.10 – Circuitbreaker shall have a minimum 65,000 amp interrupting capacity.2.10b 1.1This document covers pin and sleeve marine/industrial grade,reefer power outlet assemblies. Useable in dry, damp, wet, outdoor marine locations for providing electrical power to refrigerated containers. Assemblies shall be UL listed with enclosures incorporating interlocked reefer power outlets in a modular multi-gang arrangement. Devices are factory wired to a UL recognized power distribution block and rated 30, 32, 50, and/or 60 amps at 250 or 480 VAC, 50 – 60 Hz. Devices are also rated for continuous use in temperatures from -20 degrees to +140 degrees F. These devices must provide internal environmental seals for marine and extreme wet applications, and are to be mechanically interlocked.1.2All assemblies specified shall be manufactured by Mipco ascomplete assemblies and shall be marked as stated. Nominal Inrush Current Protection Requirements –Circuit breaker shall have a minimum (18,000 high shock) 22,000 amp interrupting capacity. 2.11 Flap Cover or Screw Cover Option –Flap cover optionmust provide weather-tight capability to the exposed contacts by utilizing a spring actuated self closing flap. Watertight capability shall be obtained by using a gasketed screw cap.

2.0PRODUCT CLASSIFICATION

Grounding – The grounding of the device shall beaccomplished through a separate ground (earth) that will make first and break last. Plug ground pin will activate interlock mechanism. The ground pole shall be bonded to a UL recognized ground block labeled for connection to the ground conductor. *All non-current carrying metallic components must begrounded to insure complete system grounding.2.6 ENCLOSURES: Housings – Receptacle housings shall be metallic, copper freealuminum or thermoplastic with performance equal to or greater than DuraV’ or AMTUF 2.1 Construction Access Panel – All enclosures shall be specified either 12 or14 gauge stainless steel, and shall conform to NEMA 4X requirements for watertight, dust-tight, and corrosion resistance.2.2 – Each enclosure shall provide an access paneldesigned to allow complete wiring compartment accessibility. Bolted plate or hinged panel to be specified.2.3 RECEPTACLES Power Distribution Block – All interlocked reefer poweroutlet assemblies shall be factory wired to a U.L. recognized power distribution block. Line lugs shall accommodate a range of wire sizes compatible with the total amperage rating of all enclosed receptacles 2.4 Interlocked Receptacles – The receptacles shall be of amodular design, mechanically interlocked to allow the circuit to be energized only after a mating plug is fully inserted into the receptacle and the actuating rod is pushed forward. All interlocked receptacles shall allow the de-energizing of the circuit before mated contacts are disengaged upon plug removal. Plug ground pin will activate interlock mechanism. The mounting dimensions shall be the same for interlocked receptacles with a high (65K) or nominal (greater than or equal to 20K) inrush current circuit breaker to allow for future upgrades.2.5

3.0DESIGN AND WIRING REQUIREMENTS

3.1 Wiring Conduit Entry – All enclosure assemblies must be factory wired toconform to guidelines stated in the NEC for wire sizing, Table 310-16 and wire bending space, Article 373-6. Wiring of individual interlocked reefer outlets must allow for the removal/replacement without opening the access door.3.2 – Assemblies shall include a conduit entrancewith an aluminum conduit hub; size and location to be specified.

4.0APPLICABLE COMPLIANCES

4.1 Underwriters Laboratories (UL) – The enclosureassemblies specified herein shall be listed in applicable sections of UL Standards 489, 1682 and 1686.4.2 Canadian Standard Association (CSA) – The devicesshall be listed in the applicable sections of CSA C22.2-182.1.4.3 American Bureau of Shipping (ABS) 4.4Federal Department of Transportation – shall comply withFederal Register volume 47, number 68, subpart 11.79 and the United States Coast Guard (USCG).4.5 International Electro-Technical Commission (IEC) –The 32 ampere devices specified shall conform to IEC 309-1, and IEC 309-2, EN60309.4.6 International Standards Organization (ISO) – The 32ampere devices specified shall conform to ISO 1496/2, Annex L.
™ , and have a flame rating no less thanUL94 V0.2.7 Interiors – Receptacle interiors must be molded thermoset,UL94 V0 and be replaceable for ease of maintenance. 2.8

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