EGA & Corrosive/Wet Locations - Sections 20 & 22 Flashcards

1
Q

If retrofitting an old installation under the Class and division system, where would someone find rules pertaining to the zoning of explosive gas atmospheres?

A

Annex J20.

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2
Q

If a conduit is buried anywhere under a zone classified area of a gas station, is it considered hazardous?

A

Yes, it is in a zone 1 area.

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3
Q

If a gas tank vent pipe has a mushroom cap, how is the zoning around it developed?

A

A spherical radius of 900 mm from the outlet will be zone 1;

Beyond that, up until 1.5 m radius will be zone 2;

All cylindrical area beneath above zoning will be zone 2.

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4
Q

Is the floor of an aircraft hangar considered hazardous?

A

Yes, up until 450mm above grade.

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5
Q

In general, are pits hazardous?

A

Yes, vapor usually pools there.

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6
Q

In a commercial repair garage, how far above grade would an adjacent office need to be to not be considered hazardous?

A

50 mm.

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7
Q

Should you light a cigarrette while fueling?

A

Probably not.

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8
Q

What does “category 1” mean?

A

A wet location.

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9
Q

Where will one find non-hazardous enclosures in the CEC?

A

Table 65.

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10
Q

If a conductor passes from a cat 1 or 2 location into a dry location, the conductors on the dry side will be __________.

A

Higher up;

So that the moisture collects in the cat location.

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11
Q

Should aluminum be used when wiring your friend’s barn?

A

No.

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12
Q

What is considered adequate ventilation for a barn?

A

3 air changes per hour;

as per the national farm building code of canada.

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