Electrical And Data Separation

There are four classification levels of susceptibility for cables.

Electrical and data separation.

The national electrical code nec class 2 and class 3 covers remote control signaling and power limited circuits covered by chapter 7 in article 725. Minimum separation distance from power source at 480v or less. I also see this same distance in other specs and publications. All data telecommunications or sensitive cabling should not be placed near 3 phase cables as these are normally used for heavy electrical inductive loads e g.

The text in bicsi s tampa fl tdmm can also be found in the national electrical safety code nesc section 320 b 2 separation from other underground installation. They are considered to be a special condition other than a normal power circuit. Conduit systems to be occupied by communication conductors shall be separated from conduit systems to be used for supply systems by 75 mm 3 in of concrete 100 mm 4 in of masonry or 300 mm 12 in of well tamped earth. Power control wiring separation if you are asking separation needed for interference not code we usually use 12 separation between lv signal cabling and line voltage cabling as a general rule.

Unshielded power lines or electrical equipment in proximity to open or non metal pathways. Unshielded power lines or electrical equipment in proximity to grounded metal conduit pathway. Condition 2kva 2 5kva 5kva. The problem is the possibility of induced noise in the signal or data cable.

Susceptibility in this context is understood to be an indication of how well the signal circuit can differentiate between the undesirable noise and required signal. It follows that a data communication physical standard such as rs 232e would have a high susceptibility and a 1000 v 200 a ac cable has a low susceptibility. In class 2 and class 3 systems either the voltage or the current depending upon circuit design is limited to a level that will not cause a fire and under. Air conditioning welding equipment and motors.

All cabling should avoid any proximity to radio or television transmitters beacons and overhead transmission lines. The electrical wiring will not be affected in any way. It states separations between supply and communication conduit systems.