The following details the requirements regarding the use of power distribution blocks in industrial control panels. Depending upon the specific application and the standard to which the equipment is being designed, there are certain PDBs that can meet these. The Unified Facilities Criteria (UFC) system is prescribed by MIL-STD 3007 and provides planning, design, construction, sustainment, restoration, and modernization criteria, and applies to the Military Departments, the Defense Agencies, and the DoD Field Activities in accordance with USD (AT&L). 1 Conditions (a), (b), and (c) are as follows: (a) Exposed live parts on one side and no live or grounded parts on the other side of the working space, or exposed live parts on both sides effectively guarded by insulating material. Insulated wire or insulated busbars operating at not over 300 volts. nto account the moment on pole by wind load. Kinds of load to supporting structures are (a) vertical load, ted is as follows: -End of distribution lin lines are needed to keep the load. And for general industrial control equipment, voltage range 301-600, shortest distance is shown as 1/2" with this same value being shown through oil or air over surface. Between live parts of opposite polarity, 251-600V, Through air gap is 1", Over surface is 2". Between live parts and grounded. The cable distribution box should be installed near the load center to minimize the length of the cable and reduce power loss.
