What is the MINIMUM clearance needed between the front of the telephone booth and any wall or fixture for most installations?

Exhibit: A pay telephone using coins needs to be installed in a public are a. In the specifications, it is required that the telephone shall meet the ADA (Americans with Disability Act) requirement for side reach using a wheelchair. What will be the maximum reachable height or the value of "X"?

A telephone facility and an electrical facility are required in a tunnel. To reduce the effects of EMI and eliminate the need for additional shielding of the cables, where would each facility be placed?

Exhibit: In this future marina layout, what would be the pre - cabling guideline to follow for the terminal A?

Which type of protection for electrical power stations provide isolation against a rise in potential of station ground and also provide drainage protection against longitudinally - induced voltages?