BI 7.2.3-44
Nov-2017, Rev 2
12
13
VII.
System Specifications and Ratings
QBox Specifications:
• Maximum Voltage: 600 Volts
• Maximum Current: 40 Amps
• Allowable Number of Strings: 2
• Allowable Wire: 10AWG or 8AWG
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Inputs: 12 AWG or10AWG
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Outputs: 12AWG or 10AWG or 8AWG
• Enclosure Rating: Type 3R
• Roof Slope Range: 2.5:12 - 12:12
• Attic Conduit Pass-Through: ¾" EMT
• Max Side Wall Conduit Size: ¾"
• Dimensions:
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Box: 5.76" W x 5.4"D x 2.6" H
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Flashing 12"W x 12"D
• Ambient Operating Conditions: -35°C - 75°C
• Testing has shown that there is a 25.5°C increase in box temperature over ambient when wind speed is less
than 1 mps and solar irradiance in plane of array is 1000 W/m^2. Temperature rise due to irradiance must be
considered when calculating ambient operating conditions.
• Compliance:
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Wire Nuts: UL 486C, UL486D
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QBox: UL1741
• System Marking:
• Periodic Re-inspections: If re-inspections yield loose components, loose fasteners, or any corrosion between
components, components that are found to be affected are to be replaced immediately.
