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Questions and Answers
Flexible Nonmetallic Conduit (FNMC) is used mainly for decorative purposes.
Flexible Nonmetallic Conduit (FNMC) is used mainly for decorative purposes.
False (B)
The interior of Flexible Nonmetallic Conduit (FNMC) is rough and designed to conduct electricity.
The interior of Flexible Nonmetallic Conduit (FNMC) is rough and designed to conduct electricity.
False (B)
FNMC is commonly used due to its economic value.
FNMC is commonly used due to its economic value.
True (A)
Flexible Nonmetallic Conduit is permitted for direct burial only if marked for that purpose.
Flexible Nonmetallic Conduit is permitted for direct burial only if marked for that purpose.
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FNMC can be used in areas where there is a high risk of physical damage.
FNMC can be used in areas where there is a high risk of physical damage.
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The permitted length of installed FNMC is longer than 1,800 mm without exceptions.
The permitted length of installed FNMC is longer than 1,800 mm without exceptions.
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FNMC can safely carry voltage levels in excess of 600 volts.
FNMC can safely carry voltage levels in excess of 600 volts.
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Flexible Nonmetallic Conduit is suitable for outdoor locations if listed and marked appropriately.
Flexible Nonmetallic Conduit is suitable for outdoor locations if listed and marked appropriately.
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Flexible non-metallic conduit is primarily used for wiring in industrial settings with high heat.
Flexible non-metallic conduit is primarily used for wiring in industrial settings with high heat.
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One advantage of flexible non-metallic conduit is its ability to be easily bent and routed through complex paths.
One advantage of flexible non-metallic conduit is its ability to be easily bent and routed through complex paths.
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Flexible non-metallic conduit can be used in areas exposed to direct sunlight for long durations.
Flexible non-metallic conduit can be used in areas exposed to direct sunlight for long durations.
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Polyvinyl chloride (PVC) is a common material used to make flexible non-metallic conduit.
Polyvinyl chloride (PVC) is a common material used to make flexible non-metallic conduit.
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When installing flexible non-metallic conduit, it is crucial to use the correct fittings to secure the conduit and prevent moisture ingress.
When installing flexible non-metallic conduit, it is crucial to use the correct fittings to secure the conduit and prevent moisture ingress.
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Flexible non-metallic conduit should be buried at least 4 feet underground for safety.
Flexible non-metallic conduit should be buried at least 4 feet underground for safety.
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Flexible non-metallic conduit is preferred for indoor installations where flexibility is needed.
Flexible non-metallic conduit is preferred for indoor installations where flexibility is needed.
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Using metal fittings is advisable when installing flexible non-metallic conduit to enhance its waterproofing.
Using metal fittings is advisable when installing flexible non-metallic conduit to enhance its waterproofing.
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Study Notes
Flexible Non-Metallic Conduit (FNMC)
- FNMC is used as a mechanical protector for electrical conductors
- It has a smooth inner surface and a non-conducting fibrous outer layer
- It is a common electrical wiring conduit due to cost-effectiveness
- FNMC is used in various scenarios:
- Where flexibility is needed for installation, operation, or maintenance
- To protect conductors from vapors, liquids, or solids
- In outdoor locations, where suitable
- For direct burial, if listed and marked
- Liquid tight flexible nonmetallic conduit can be longer than 1800mm
- Pre-wired assembly (15/20mm to 25/32mm) is permissible
FNMC: Not Permitted
- FNMC is not allowed where there's potential physical damage
- FNMC is not suitable where the combination of ambient and conductor temperatures exceeds the approved rating for the conduit
- Runs more than 1800mm are not allowed
- FNMC is not allowed for conductors with a nominal voltage over 600 volts
FNMC Material
- Commonly made of Polyvinyl Chloride (PVC)
FNMC Installation
- Proper fittings are crucial to secure the conduit and prevent moisture ingress.
FNMC Use Cases - Example Question
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Installing wiring in a wet location is a situation where FNMC is appropriate (among others suitable uses)
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Running wires behind drywall is another situation where FNMC is often used.
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Wiring in high heat industrial settings is not a scenario where FNMC is expected to perform well.
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Installing underground cables is not a situation often using FNMC.
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Description
This quiz covers the essential features and regulations regarding Flexible Non-Metallic Conduit (FNMC) in electrical installations. Learn about its applications, advantages, and restrictions to ensure proper usage in various environments. Test your understanding of where FNMC can and cannot be utilized safely.
