Power limited circuit cable for plenum applications in a constant current lighting system

• US 20060160402A1
• Filed: 12/29/2005
• Published: 07/20/2006
• Est. Priority Date: 12/29/2004
• Status: Abandoned Application

• Current Assignee: Coleman Cable Incorporated (Southwire Company)
• Original Assignee: Coleman Cable Incorporated (Southwire Company)
• Inventors: Kowalski, Wayne James, Peterson, Philip
• Application Number:
  US11/321,808
• Publication Number:
  US 20060160402A1
• Time in Patent Office: Days
• US Class Current: 439/397
• CPC Class Codes: H01B 11/02 Cables with twisted pairs or quads

Abstract

A power limited circuit cable for plenum applications in a constant current lighting system comprises a twisted pair cable or a parallel pair cable, a ground conductor, a housing comprising a first compartment for the ground conductor and a second compartment for the twisted pair cable or parallel pair cable, a first dielectric layer disposed between the twisted pair cable or parallel pair cable and the housing of the first compartment and a web portion disposed between the first and second compartments of the housing. The plenum cable has a capacitance between the first and second conductor of the twisted pair cable or parallel pair cable and the ground conductor is 19±3 pF/ft at a frequency of 1 KHz.

Claims

1. A plenum cable having a mutual capacitance, the plenum cable comprising:

a twisted pair cable comprising a first and second conductor and a dielectric layer surrounding each of the first and second conductors, the first and second conductors and corresponding dielectric layers being twisted substantially along the length of the cable;

a ground conductor;

a housing comprising a first compartment for the ground conductor and a second compartment for the twisted pair; and

a web portion disposed between the first and second compartments of the housing and adapted to separate the first and second compartments.

2. The cable of claim 1 wherein the housing is rated for plenum applications.

3. The cable of claim 1 wherein the first and second conductors are composed of approximately 18 AWG bare copper wire.

4. The cable of claim 1 wherein the first and second conductors are composed of bare copper wire ranging from 12-18 AWG.

5. The cable of claim 1 wherein the ground conductor is composed of approximately 14 AWG bare copper wire.

6. The cable of claim 1 wherein the ground conductor is composed of approximately 18 AWG bare copper wire.

7. The cable of claim 1 wherein the ground conductor is composed of bare copper wire having a size measurement ranging from 12-18 AWG.

8. The cable of claim 1 wherein the mutual capacitance between the first and second conductor of the twisted pair cable is 19±

3 pF/ft at a frequency of 1 KHz.

9. The cable of claim 1 further comprising a first dielectric layer disposed between the twisted pair cable and the housing of the first compartment.

10. A cable for a lighting system comprising:

a twisted pair cable comprising a first and second conductor and a first dielectric layer surrounding each of the first and second conductors, the first and second conductors composed from an approximately 18 AWG copper wire, the first and second conductors and corresponding dielectric layers being twisted substantially along the length of the cable, the twisted pair cable having a mutual capacitance of 19±

3 pF/ft at a frequency of 1 KHz;

a ground conductor, the ground conductor composed from an approximately 14 AWG copper wire; and

a housing comprising a first compartment for the ground conductor and a second compartment for the twisted pair.

11. The cable of claim 10 further comprising a web portion disposed between the first and second compartments of the housing, adapted to separate the first and second compartments.

12. The cable of claim 10 further comprising a first dielectric layer disposed between the twisted pair cable and the housing of the first compartment.

13. The cable of claim 10 wherein the housing is rated for plenum applications.

14. A plenum cable having a mutual capacitance, the plenum cable comprising:

a cable comprising a twisted pair cable or parallel pair cable, the cable comprising a first and second conductor and a dielectric layer surrounding each of the first and second conductors;

a ground conductor;

a housing comprising a first compartment for the ground conductor and a second compartment for the twisted pair cable or parallel pair cable; and

a first dielectric layer disposed between the twisted pair cable or parallel pair cable and the housing of the first compartment.

15. The cable of claim 14 further comprising a web portion disposed between the first and second compartments of the housing adapted to separate the first and second compartments.

16. The cable of claim 14 wherein the first and second conductors are composed of approximately 18 AWG bare copper wire.

17. The cable of claim 14 wherein the first and second conductors are composed of 12-18 AWG bare copper wire.

18. The cable of claim 14 wherein the ground conductor is composed of approximately 14 AWG bare copper wire.

19. The cable of claim 14 wherein the ground conductor is composed of approximately 18 AWG bare copper wire.

20. The cable of claim 14 wherein the ground conductor is composed of 12-18 AWG bare copper wire.

21. The cable of claim 14 wherein the mutual capacitance between the first and second conductor of the twisted pair cable is 19±

3 pF/ft at a frequency of 1 KHz.

22. The cable of claim 14 wherein the housing is rated for plenum applications.

23. The cable of claim 14, the first and second conductors and corresponding dielectric layers of the twisted pair cable being twisted substantially along the length of the cable.