Cable Overblowing Junction Box

Available in three sizes, the GMP  Cable Overblowing Junction Boxes have been designed to install a new cable or innerduct into an existing occupied 1-1/4 in., 1-1/2 in. and 2 in.  innerduct (subject to space being available).

The Single Size Junction Box comprises an aluminium base and lid that form a pressurized air chamber into which one end of an existing occupied innderduct can be attached. The existing cable can exit the box through an opening that has 3 cable seal slots, one of which will house the seal to suit the size of the existing cable. The third branch is then connected to a GMP Cable Blowing Machine via a short slave length of innerduct for the installation of the extra cable or tube(s). A collection of seals ranging from 7.5 – 20 mm included with junction box.

How To Configure Your Junction Box

Junction Box Instructions

GMP SDR Cable Overblowing Junction Box
GMP SDR Cable Overblowing Junction Box
Cable Diameters: 7.5 - 20 mm
The maximum diameter of a new cable for installation is dependent on the diameter of the existing cable and the duct size.
Part Number:P/N 89066P/N 89067P/N 89068
Duct Range Limit: 1-1/4 in. SDR1-1/2 in. SDR2 in. SDR
Installation Principle: Viscous DragViscous DragViscous Drag
Max Operating Pressure: 175 psi (12 Bar)175 psi (12 Bar)175 psi (12 Bar)
Length: 12" (305 mm)12" (305 mm)12" (305 mm)
Width: 6" (152 mm)6" (152 mm)11.5" (292 mm)
Height: 3" (76 mm)3" (76 mm)3.3" (84 mm)
Weight: 9 lbs. (4kg) 9 lbs. (4kg) 14.5 lbs. (6.6kg)
Min Flow Acceptance:250 cfm (7m³/min)375 cfm (10m³/min)700 cfm (20 m3/min)