
Cable Strain Relief

Strain relief devices protect electrical equipment by absorbing the push and pull forces exerted on the attached wires and cables. They provide the cables with protection against over-bending, fraying and cutting and, they keep the cables in a stationary position to prevent twisting and pulling.
Strain reliefs are available in either a dome or flex body style. A dome-style strain relief provides protection for the cable against the possibility of cutting, due to sharp edges of the attached devices or electrical panel. Flex-style strain reliefs offer flexible bend protection from stress that is applied perpendicular to the axis of its entry into the equipment. It also helps to prevent kinking as the cable is pulled at extreme angles.
Cable size is very important when specifying a strain relief. The outer diameter of the cable must be known in order to select the appropriate strain relief. A strain relief’s diameter refers to the diameter of the cable designed to pass through. The mounting size refers to the size of the strain relief’s threads, which are used to connect the strain relief to a device or panel.
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3 Tips for Proper Wire Management
Be consistent. This is one of the most overlooked aspects of great wire management. Consistency should apply to everything including the length of wire that is being used, the bend radius of the wire, the wire placement within the bundles and the label positions.
Don't always take the shortest path. When routing wires and trying to achieve a clean and organized look, it is important to not always take the shortest route to land the wires. For example, when wiring hardware on the door of an electrical enclosure it is important to consider all of the wires that are going to be at that location and bundle these wires whenever possible. Instead of just running the wires directly to the place that they need to be connected, route the wires in a way that will pass other devices or connection points near the wire and pick up any other wires along the way that are related to those other connection points.
Wire tie everything that is not concealed. When wiring in a control panel, the wires are often concealed by the wire ducting. However, there are times when wires are not concealed and are difficult to control in such a way that will result in a clean and organized look. To assist with this problem, it is important to use wire ties and wire tie anchors. Make sure that the same size wire tie and the same color is used throughout the install process.