WNA, Inc.

Every season we post a photo illustrating the importance of including Construction Administration in the Engineering scope of work. Even small, seemingly unimportant installation deficiencies can cause poor system performance, increased maintenance, or reduced equipment longevity.

By correctly identify the installation blooper, you are automatically entered to win a $100 Shell Oil Gas Card. Drawing will be held August 20, 2010, and past winners are eligible to win again.

Which response best identifies the installation blooper in the photo?

	When connecting to vibrating machinery, EMT or conduit should be disconnected to prevent vibration from being transferred to the junction box since the wiring is much more flexible and able to isolate vibration better than rigid conduit or EMT.
	In high security SCIF installations, this is a common method of providing a "non-conductive break" in the metallic conduit. This particular installation is further enhanced with the addition of the "standard structural communications cabling support" which prevents over-deflection of the conduit connection to the junction box and doubles as a place for a technician to temporarily connect a field telephone to the communications system in the facility.
	Communication wiring is a viable replacement for all-thread support rod as the four conductors provide exceptional strength in tension provided that the installing technician is well trained in knot-craft at an approved sailing or other navel training facility.
	Incorrectly installed electrical conduit and wiring is not only poor construction practice but can also potentially result in fire or injury. All electrical work should be closely monitored and any deviations from contract requirements or the NEC must be corrected immediately. This section of conduit should be completely replaced from the junction box to the load to provide a properly supported, code compliant, and safe installation.

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