friends:
- we have an overhead door installed in a class 1 div 1 area. A control panel is installed adjacent to the door.
- The power has been installed per requirements of the area classifications.
- on both sides of the door, a compartment with a hinged cover houses all the belts and counterweight of the door.
also inside this compartments are intrinsically safe photoeye amplifier sensors. A cable extends from the devices to go back to the Control Panel. The cable runs through a tube preinstalled in the compartment with open ends.
- Also a limit switch in a Type 1 enclosure is installed above one of the compartments. inside this limit switch enclosure are gears and a shaft that penetrates the switch's enclosure.
- at the bottom of the door, an intrinsically safe air edge switch is installed. A coiled cable sticks out of the bottom of the door and has a metal cup covering at the end. halfway the compartment, an grommeted opening is provided. The metal cup cover goes over the opening and another cable from the Control panel went through the compartment and comes out of the opening to splice with the air edge switch.
MY questions:
1. Can the hinged compartment enclose the devices?
2. Can the photoeye sensor cable run back to the Control Panel without a raceway?
3. The limit switch is a given, it definitely needs a NEMA 7 enclosure. any comments on this?
4. Can the air switch cable splice be contained in the metal cup covering? Is a NEMA 7 enclosure required?
Please give me some suggestions so we can installed this door properly and safely in this area.
Thanks Comrades.
- we have an overhead door installed in a class 1 div 1 area. A control panel is installed adjacent to the door.
- The power has been installed per requirements of the area classifications.
- on both sides of the door, a compartment with a hinged cover houses all the belts and counterweight of the door.
also inside this compartments are intrinsically safe photoeye amplifier sensors. A cable extends from the devices to go back to the Control Panel. The cable runs through a tube preinstalled in the compartment with open ends.
- Also a limit switch in a Type 1 enclosure is installed above one of the compartments. inside this limit switch enclosure are gears and a shaft that penetrates the switch's enclosure.
- at the bottom of the door, an intrinsically safe air edge switch is installed. A coiled cable sticks out of the bottom of the door and has a metal cup covering at the end. halfway the compartment, an grommeted opening is provided. The metal cup cover goes over the opening and another cable from the Control panel went through the compartment and comes out of the opening to splice with the air edge switch.
MY questions:
1. Can the hinged compartment enclose the devices?
2. Can the photoeye sensor cable run back to the Control Panel without a raceway?
3. The limit switch is a given, it definitely needs a NEMA 7 enclosure. any comments on this?
4. Can the air switch cable splice be contained in the metal cup covering? Is a NEMA 7 enclosure required?
Please give me some suggestions so we can installed this door properly and safely in this area.
Thanks Comrades.