Explosion Proof dust collector

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dmanda24

dmanda24

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I am connecting a dust collector (picture attached) and I have a couple of questions:
1) the 3/4 inch electrical connector for incoming power goes right into the vacuum chamber what do I use to seal this connection< is there a spesial connector or a sealant??

2) The motor was sent with an optional explosion proof junction box, the dust collector will no be used in a dangerous environment so the wiring does not have to be explosion proof, if it were, how would I make the connection? I imagine I can't just run the wires freely from were they enter at the top? The explosion proof junction box has a 3/4 inch threaded hole?

thanks
 
dmanda24 said:
I am connecting a dust collector (picture attached) and I have a couple of questions:
1) the 3/4 inch electrical connector for incoming power goes right into the vacuum chamber what do I use to seal this connection< is there a spesial connector or a sealant??

2) The motor was sent with an optional explosion proof junction box, the dust collector will no be used in a dangerous environment so the wiring does not have to be explosion proof, if it were, how would I make the connection? I imagine I can't just run the wires freely from were they enter at the top? The explosion proof junction box has a 3/4 inch threaded hole?

thanks
Click to expand...
If the area is not explosionproof use a regular fs box.
 
dmanda24 said:
use an fs box at the motor, ok but how do I enter the box I entered the top of the dust connector enclosure with a flexible metal conduit and have free conductors running to the motor.
Click to expand...

Hire a crane and pick up the building and spin the building on to the fs box connector.
 
quogueelectric said:
Hire a crane and pick up the building and spin the building on to the fs box connector.
Click to expand...

I don't think you are understanding, I will use a connector to get into the dust collector and the you want to use another connector at the fs box without any conduit, then what's the point of the connector? do they make a connector for just the thhn wire into the fs box?
 
I understand the collector machine itself will not be installed in the hazardous location.

Using a method for hazardous locations is not necessary.

The question that I have is:
Is this unit listed? I am not sure if the wiring entering the enclosure and passing through the collection chamber does not make sense to me. Check the listing.
Also, is there another location in the enclosure to enter the wiring closer to the wiring chamber?
 
dmanda24 said:
I don't think you are understanding, I will use a connector to get into the dust collector and the you want to use another connector at the fs box without any conduit, then what's the point of the connector? do they make a connector for just the thhn wire into the fs box?
Click to expand...
How about some sort of flexible conduit between the fs box and the motor/dust collector??
 
Pierre C Belarge said:
I understand the collector machine itself will not be installed in the hazardous location.

Using a method for hazardous locations is not necessary.

The question that I have is:
Is this unit listed? I am not sure if the wiring entering the enclosure and passing through the collection chamber does not make sense to me. Check the listing.
Also, is there another location in the enclosure to enter the wiring closer to the wiring chamber?
Click to expand...

that is where the instruction manual say the electrical connection goes
 
benaround said:
It's the DUST that is the Class II location, you have some homework to do.
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the dust is not class II, but if it were how would you connect it, I have never dealt with explosion proof before. The engineer may still want it to be wired explosion proof to justify his purchase since he was the one that ordered the optional explosion proof junction box, which is not needed. I spoke to a supervisor and the dust they are collecting is completely safe and the other dust collectors on the site are not wired explosion proof.
 
Since you are wiring to a piece of equipment, it is difficult to say exactly what to do. Again, I ask if this is a listed piece of equipment, and if so, listed by whom and what for.

If you are concerned, maybe using 300.22 can give you some guidance. I know that section is not for equipment as in your case.

I would also contact the manufacturer for more info in regards to the wiring connections.
 
The problem I have with this is the confusion between an explosionproof installation as covered by Article 501 and a dust ignitionproof installation as covered by 502. They are not the same and the Article 502 installation does not require explosionproof equipment or wiring methods. In fact some equipment that is suitable for use in Article 501 applications is not suitable for Article 502 applications.
 
Spin a 2' nipple into the dust collector. Spin an elbow on to that spin an 8' piece with a kick on it to bring it to the wall. Spin one more elbow to bring it down the wall. cut and spin on a nipple to bring the controller to the correct height on the wall. Spin the controller box on the nipple and fasten it to the wall. Pm me if you have any questions it is easier to talk you through it than type it.
 
What kind of dust is this you're collecting?

What kind of dust is this you're collecting?

Many dusts are dangerous in an environment like you will find in the collection chamber. For example, the dust inside a grain silo ignited when the person filling the silo dropped a trouble light down from the top of the silo and the bulb broke. That explosion killed four people -- the guy who dropped the light died instantly, and three more people died when two ambulances racing the eight blocks between the grain silo and the hospital colided at an intersection.

My point? Take nothing for granted. I don't think you've provided enough information to arrive at the answer you need.
 
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