10 Questions
What is one of the conditions for which electrical metallic tubing (EMT) should not be used?
Subjected to mechanical disturbance during or after construction
Which type of fill should electrical metallic tubing (EMT) not be used with?
Cinder fill from coal burning furnaces
According to the PEC, EMT should not be used in which type of hazardous location?
Class I hazardous location
What is the third classification of hazardous location based on the PEC?
Class III
Why should electrical metallic tubing (EMT) not be exposed to corrosive fumes?
It will lead to the formation of acid
Which type of area is considered a Class II hazardous location?
Coal preparation plants
What happens when cinders from coal burning furnaces get wet?
Acid is formed and will destroy raceways
What is the primary reason for not using EMT in areas with flammable gases and vapors?
Risk of explosion due to formation of ignitable gases
What is the potential consequence of exposing electrical metallic tubing (EMT) to extreme heat?
EMT becomes brittle and prone to cracking
What is one effect of subjecting electrical metallic tubing (EMT) to mechanical disturbance during or after construction?
Possible damage such as minor to major cracks
Test your knowledge about the usage and limitations of electrical metallic tubing (EMT) and rigid metal conduit. Learn about the conditions under which EMT should not be used, and the factors that can cause damage to it.
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