Marking lines on 90-degree right-angle cable tray bends
Mark square and cut both ends of the cable tray, taking care to meet the requirements of the technical data and ensuring that the finished length is greater than or equal to 350mm. Creating a 90-degree elbow in an electrical cable tray, often called a "fabricated" or "mitered" bend, involves cutting, bending, and fastening a straight section of tray. The most common method involves creating two 45-degree cuts to form a 90-degree angle. Construction of a flat 90° bend (A) The amount of tray lip to be removed is equal to 2, 3/4 the width of the tray, half of this measurement will be removed on either side of the centre line. If fabricating, mark the side rail at intervals based on the calculated arc length, cut V-notches, and bend the tray until the gap closes. (A) = cable tray width (600mm) and B = Size of angle (22°) First you have to find (C) which is found by dividing 90°.
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