Conveyor

[Gustav Eriksson]

Hi
Iam new at this forum and iam working with electrical design at conveyor.
Iam workin in Sweden in the nothern europe and we deliver machines all over the world. I got a few questions here that i hope some of you can answer to.

1. We are building conveyor with a consept that looks like as shown in link http://www.woodhead.com/bradpower/how.html what demands do the contacts have to forfill in US ? UL XXX? Do some of you have experiense of this way of connecting machines ?

2. We are connecting the conveyors by putting the cables together with double sleeves at the mainswitch at every conveyor is that ok to do that in US or do we have to go thrue a terminal ?

3.In our cabinets we are
using single wire with MTW approval is that realy nessesary because the price of the cable is high here in Sweden.

 

[iwire]

Gustav

I can't give you any help with the UL listing requirements but I can tell you that using cables for that application goes against traditional wiring methods here. You will get a lot of resistance to using 'plug and play' cable in place of metal conduits with individual conductors installed by electricians.

 

[StephenSDH]

Gustav

I can't give you any help with the UL listing requirements but I can tell you that using cables for that application goes against traditional wiring methods here. You will get a lot of resistance to using 'plug and play' cable in place of metal conduits with individual conductors installed by electricians.

If a product saves labor hours and is easy to change out to reduce downtime then I think alot of people are interested.

 

[elohr46]

Hi
Iam new at this forum and iam working with electrical design at conveyor.
Iam workin in Sweden in the nothern europe and we deliver machines all over the world. I got a few questions here that i hope some of you can answer to.

1. We are building conveyor with a consept that looks like as shown in link http://www.woodhead.com/bradpower/how.html what demands do the contacts have to forfill in US ? UL XXX? Do some of you have experiense of this way of connecting machines ?

2. We are connecting the conveyors by putting the cables together with double sleeves at the mainswitch at every conveyor is that ok to do that in US or do we have to go thrue a terminal ?

3.In our cabinets we are
using single wire with MTW approval is that realy nessesary because the price of the cable is high here in Sweden.

What I see here is the EC has less work on the install so that the manufacture can make more on the equipment sale. Those controllers probably cost a small fortune and when one goes bad who profits?

 

[weressl]

Hi
Iam new at this forum and iam working with electrical design at conveyor.
Iam workin in Sweden in the nothern europe and we deliver machines all over the world. I got a few questions here that i hope some of you can answer to.

1. We are building conveyor with a consept that looks like as shown in link http://www.woodhead.com/bradpower/how.html what demands do the contacts have to forfill in US ? UL XXX? Do some of you have experiense of this way of connecting machines ?

2. We are connecting the conveyors by putting the cables together with double sleeves at the mainswitch at every conveyor is that ok to do that in US or do we have to go thrue a terminal ?

3.In our cabinets we are
using single wire with MTW approval is that realy nessesary because the price of the cable is high here in Sweden.

Have the wiring system approved by UL or any other NRTL.(If you would use the BradPower system, this step is already accomplished.)

Make sure that your Client checks with the local authority(AHJ) that the above approval on the wiring system is acceptable to the authority. The AHJ may even accept an approval by a foreign entity, but that is less likely.

In other words you would attempt to sell this product as a system, not components. Since the entire system can be considered as a single machinery, the AHJ may not even have the authority since his authority - usually - only extends to the electrical installation up to the machinery and that the main power supply connection complies with the machinery's requirements.

 

[petersonra]

Hi
Iam new at this forum and iam working with electrical design at conveyor.
Iam workin in Sweden in the nothern europe and we deliver machines all over the world. I got a few questions here that i hope some of you can answer to.

1. We are building conveyor with a consept that looks like as shown in link http://www.woodhead.com/bradpower/how.html what demands do the contacts have to forfill in US ? UL XXX? Do some of you have experiense of this way of connecting machines ?

You are asking on a site that is populated mostly by electricians who make a living wiring these things up. They naturally might have an inclination toward wires run in conduit. Personally, I like the cord connected stuff. It is a whole lot easier to work on. And getting the thing back into service faster is a big deal. I know a fair number of companies that run conduit to the vicinity of the motor and then cord and twistlok plug. This makes swapping out a motor a lot faster and gets you back in service.

There are some cases where this kind of cabling system is not appropriate, such as where the cable might be subject to damage.

2. We are connecting the conveyors by putting the cables together with double sleeves at the mainswitch at every conveyor is that ok to do that in US or do we have to go thrue a terminal ?

Its kind of a toss up. You only have to hook it up once, so as long as the wires are already run and the terminals and stuff are already there and if it is just a matter of hooking up a couple wires, I don't think it makes all that much difference and the perception will be by some that the terminal connection is "better".

3.In our cabinets we are
using single wire with MTW approval is that realy nessesary because the price of the cable is high here in Sweden.

You really need to look at having the control panels UL listed. You can build them yourselves and UL will provide the labels and occasional inspections. Generally you can use any UL listed wire in a UL listed panel. MTW is the most common in control panels here because that is what it is designed to be used in. It is tough, and flexes well, and is easy to work with.

I would also point out that the cabling system you are looking at is intended to be used within a machine, thus not subject to the NEC (at least for the most part). Its entirely possible a local inspector might decide that a conveyor is not a machine, and the wiring is premises wiring and it cannot be used for premises wiring.