Fan-Out Kits: When and Why

One of the most common questions we get is whether it is necessary to use a fan-out kit (900um) or breakout kit (3mm) to build up the 250um fibers when using Micro-Distribution cables.

The answer, as usual, varies depending on what you are doing. Traditional fibers do not incorporate the strength found in SSF™ fibers. Therefore, for traditional fibers we recommended using a fan-out kit or breakout kit with traditional fibers. As SSF™ fibers have a much higher tolerance due to their polymer coating, it becomes a question of your comfort in leaving 250um fibers exposed. We’ve listed a few common scenarios below with our recommendations.

Terminating Fiber to a Wall Plate: Completely up to you. If you terminate the fibers on the 250um soft peel coating and plug into a keystone, you
should have no issues with fiber left behind in the wall. If you are uncomfortable or think additional wires may be pulled in the wall behind the plate, install either a 900um or 3mm kit.

Terminating Fiber through a Cable Pass-Through Plate: We would highly recommend putting either a 900um or 3mm kit on the cable. The cable will be exposed and typically directly connected to a device.

Terminating Fiber in an Equipment Rack: Again, we would highly recommend putting either a 900um or 3mm kit on the cable. The cable will be exposed and typically directly connected to a device.

Terminating in a Fiber Tray in Equipment Rack: Most fiber trays are enclosed and do not allow for access to the 250um fibers after they are terminated. Therefore, a 900um or 3mm kit is not required.

Terminating Fiber in Surface Mount Can/Enclosure: Just like terminating in a fiber tray in an equipment rack, most fiber trays are enclosed and do not allow for access to the 250um fibers after they are terminated. Therefore, a 900um or 3mm kit is not required. If, however, you are using a generic wall enclosure or the fiber is easily accessible by others, we would recommend using a 900um or 3mm kit.