Plenum Siamese Cable, RG59, Pure Copper Conductor and Shielding, 500 ft.

Sewell Part # SW-29978-500

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HDMI Premium Cable
RG59 Diagram
At a glance:
RG59 Siamese Cable
1000 ft.
18 AWG
PVC Jacket
Braid & Foil Shield

Siamese cables combine RG59 and 18 gauge power cables together. This enables you to centralize your video and power distribution for your CCTV systems, and allows for more flexible placement of your security cameras.

RG59 has long been the standard for video distribution cabling that is both affordable and reliable. Sewell’s RG59 cable comes with dual shielding, including a 95% braid to give you great signal quality by protecting against electromagnetic interference (EMI). Combining a foil shield with the heavier 95% braid ensures this product will outperform quad shielded RG59 cable.

Product Features

  • Plenum (CMP) rated
  • Double shield
  • 95% braid
  • Rated for 75 ohms
  • Pure copper center core
  • Wood spool for easy installation
  • Ideal for commercial building installations


To ensure higher fire safety, US law mandates that only certain kinds of cables may be used in plenum spaces. CMP cable has been rated for plenum spaces. They emit less smoke and are more fire retardant. Our plenum rated Siamese cables provide the ideal solution for professional installations in any commercial building, including schools, universities, government buildings, and hospitals.

Siamese Cable Diagram

Pure Copper

Copper is the industry standard conductive material. The higher copper content in a conductor ensures a better signal transfer and clearer video. That’s why our premium Siamese cable comes with pure copper conductors for the best possible signal transfer.

The 1,000 foot cables come on a wooden spool, marked at every foot, perfect for pulling on its own or loading onto your cable tree.

Need BNC Connectors?

Need power terminal pigtails?


Mfg. Part Number

  • SW-29978-500


  • Sewell

Mfg. Part Number

  • SW-22855


  • Pull Box
  • Dual Shielding
  • 500' of RG59 + Power, Siamese Cable
  • Great for Surveillance, BNC Connections
  • 18 AWG Gauge Pure Copper Conductor
  • CMP Jacket (Plenum Approved)
  • 95% Copper Braid Shielding


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Plenum Siamese Cable, RG59, Pure Copper Conductor and Shielding, 500 ft.