Metal Wireways Questions

[MichaelJ]

I have a few questions about some wireways:
1) Is this the right definition? Industrial plant with manufacturing machines with different size wireways running between control cabinets and equipment ranging from 3"x3" to 3"x18" soild metal, snap on covers, with T,s 90,s several hundred feet total.
2) Does all wiring have to be rated for the highest rated conductor in the wireway or seperated by a continous divider? example: Motor cables rated at 600 volt does singal cable have to be 600V?
3) Table 5 in Chapter 9 shows dimensions of single conductors to be used for wieway fill, where can I get dimensions of multiconductor cable dimensions? can I use data from manufacture or can I measure the cable it self?

 

[raider1]

I have a few questions about some wireways:
1) Is this the right definition? Industrial plant with manufacturing machines with different size wireways running between control cabinets and equipment ranging from 3"x3" to 3"x18" soild metal, snap on covers, with T,s 90,s several hundred feet total.

Sounds right. Here is the definition of wireway from the NEC.

Metal Wireways. Sheet metal troughs with hinged or removable
covers for housing and protecting electrical wires
and cable and in which conductors are laid in place after
the wireway has been installed as a complete system.

2) Does all wiring have to be rated for the highest rated conductor in the wireway or seperated by a continous divider? example: Motor cables rated at 600 volt does singal cable have to be 600V?

When you talk about signal wires are you talking about class 2 or 3 remote control or signal circuits? If so you are not permitted to have power conductors and Class 2 or 3 circuits in the same wireway without using a divider.

3) Table 5 in Chapter 9 shows dimensions of single conductors to be used for wieway fill, where can I get dimensions of multiconductor cable dimensions? can I use data from manufacture or can I measure the cable it self?

You would use the data from the cable manufacture to get the cross sectional area of a multiconductor cable.

Chris

 

[jumper]

I have a few questions about some wireways:
1) Is this the right definition? Industrial plant with manufacturing machines with different size wireways running between control cabinets and equipment ranging from 3"x3" to 3"x18" soild metal, snap on covers, with T,s 90,s several hundred feet total.

386.2 Definition.
Surface Metal Raceway. A metallic raceway that is intended
to be mounted to the surface of a structure, with
associated couplings, connectors, boxes, and fittings for the
installation of electrical conductors.

2) Does all wiring have to be rated for the highest rated conductor in the wireway or seperated by a continous divider? example: Motor cables rated at 600 volt does singal cable have to be 600V?

300.3(C) Conductors of Different Systems.
(1) 600 Volts, Nominal, or Less. Conductors of ac and dc
circuits, rated 600 volts, nominal, or less, shall be permitted
to occupy the same equipment wiring enclosure, cable, or
raceway. All conductors shall have an insulation rating
equal to at least the maximum circuit voltage applied to any
conductor within the enclosure, cable, or raceway.
Exception: For solar photovoltaic systems in accordance

3) Table 5 in Chapter 9 shows dimensions of single conductors to be used for wieway fill, where can I get dimensions of multiconductor cable dimensions? can I use data from manufacture or can I measure the cable it self?

Yes

Chapter 9 Table 1 Notes

(5) For conductors not included in Chapter 9, such as multiconductor
cables, the actual dimensions shall be used.

(9) A multiconductor cable or flexible cord of two or more
conductors shall be treated as a single conductor for
calculating percentage conduit fill area. For cables that
have elliptical cross sections, the cross-sectional area
calculation shall be based on using the major diameter
of the ellipse as a circle diameter.

 

[MichaelJ]

thanks guys