How many straps are needed to support a trade size 2 IMC conduit between two enclosures that are 123 feet apart?

To determine the number of straps needed to support a trade size 2 IMC (Intermediate Metal Conduit) conduit between two enclosures that are 123 feet apart, it's essential to refer to the National Electrical Code (NEC) requirements for conduit support.

According to NEC standards, IMC conduit must be supported at intervals not exceeding 10 feet. In addition to that, it also needs to be securely fastened within 3 feet of each enclosure.

First, calculate the intervals for the 123-foot span. Since the distance is greater than 10 feet, you divide the total length by the maximum spacing interval. This can be broken down as follows:

1. Identify how many 10-foot sections fit into the total span of 123 feet:

• For the first section, you would have a strap at 0 feet (by the enclosure).

• The next straps would be placed at 10-foot intervals up to the nearest point of 120 feet.

2. At 123 feet:

• The first strap is at 0 feet,

• Then additional straps would be placed at 10, 20, 30, 40, 50, 60, 70, 80, 90