- Length of opening exceeds six times the trade diameter of the hub size
- A chamber with a large opening for easy access to perform changes in the conduit system
- For wet locations when used with gasketed covers
- For angle pulls where the distance between the raceway entry and the opposite wall of the fitting must be at least six times the trade diameter of the raceway, a pull box with easy access to conductors, 90 deg bends in a conduit system and hazardous locations
- UL File No. E3397|Federal Specification W-C-586D/A-A 50563|NEC 501.10(b) Class I Div 2, 502.10, 503.10|NEC article 370-28(a) (2)