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The CEC states that the service conductors shall not exceed 9 metres (29.5' )above grade or sidewalk.
Service conductors shall not be lower than 5.5 metres (18' )across highways, streets, lanes, and alleys.
Lower than 4 metres (13' ) across driveways to residential garages.
Lower than 5 metres (16' ) across driveways to commercial and industrial premises.
Lower than 3.5 metres (11.5' ) across ground normally accessible to pedestrians only.
The NEC should be very close to these elevations.
What else can I help you with?
The NEC requires a disconnecting means for a service would the main breaker of the panel be code for a disconnecting means?
Yes, the main breaker in the panel would meet the NEC requirement for a disconnecting means for the service. It serves as a way to disconnect power from the service entrance conductors, providing a means to safely de-energize the electrical system for maintenance or emergencies.
What is the the basis for cable tray sizing to NEC?
The sizing of cable trays in accordance with the National Electrical Code (NEC) is typically based on the maximum allowable fill capacity of cables within the tray. The NEC provides guidelines on the maximum fill capacity based on factors such as cable type, size, and insulation. It is important to follow these guidelines to ensure safe and efficient cable management within the tray.
Does the NEC permit 2 wire Romex staple on edge?
Yes, the NEC permits 2-wire Romex staple on edge when installed properly. Staples should be positioned so that they do not damage the cable's insulation and are secure without over-compressing the cable. It is important to follow NEC guidelines for the correct installation of Romex cable to ensure safety.
What size cable for 148 amps per NEC?
For 148 amps per NEC, you would typically use a 3/0 AWG copper cable for a maximum voltage drop of 3%. This size cable is rated to safely carry 148 amps while meeting the National Electrical Code (NEC) requirements. It's always best to consult the NEC and a qualified electrician to ensure compliance and safety for your specific application.
At what height is non-metallic sheathed cable considered protected from physical damage in USA?
When run exposed on walls in unfinished basements the 2005 NEC clarifies that the entire length of NM cable run exposed below the "framing members" above that wall, must be protected from physical damage. Also, the end of the protecting sleeve must have a non-metalic bushing. The NEC does not specify a measurement, but it refers to "in exposed work". Everything below the beam is "exposed". The workbook also shows sample sketches that show the protecting sleeve going all the way up to the ceiling beam. If running the cables on the underside of the framing members (beams) physical protection is not required. But smaller size cables require a running board between the cable and the beams. reference 2005 NEC 334.15C
What size copper main bonding jumper is required based on the service entrance conductors being rated at 250 kcmil thwn-thnn copper?
A size 3/0 AWG copper main bonding jumper is typically required for service entrance conductors rated at 250 kcmil copper. This is based on NEC requirements for sizing the main bonding jumper to be at least 1/10th the circular mil area of the largest service entrance conductor.
What section of the NEC requires that fittings be identified for use with service masts?
NEC 230.28
What is the NEC code requirement for the height of electrical panels?
The NEC code requires electrical panels to be installed at a height between 48 to 54 inches from the floor to the center of the panel.
The NEC requires a disconnecting means for a service would the main breaker of the panel be code for a disconnecting means?
Yes, the main breaker in the panel would meet the NEC requirement for a disconnecting means for the service. It serves as a way to disconnect power from the service entrance conductors, providing a means to safely de-energize the electrical system for maintenance or emergencies.
What is the the basis for cable tray sizing to NEC?
The sizing of cable trays in accordance with the National Electrical Code (NEC) is typically based on the maximum allowable fill capacity of cables within the tray. The NEC provides guidelines on the maximum fill capacity based on factors such as cable type, size, and insulation. It is important to follow these guidelines to ensure safe and efficient cable management within the tray.
What is the standard height requirement for a NEC disconnect in a residential building?
The standard height requirement for a NEC disconnect in a residential building is typically between 5 to 6 feet above the ground level.
How calculate the cable size when give current?
The NEC has a table that shows what size cable to use with each amperage and where it can be used.
Which standard covers the cable sequence in cable trench?
The CEC and NEC both cover this in the electrical code of the particular country.
What are the recommended mounting heights for electrical devices?
There is no minimum height specified by the NEC.
What size cable for 148 amps per NEC?
For 148 amps per NEC, you would typically use a 3/0 AWG copper cable for a maximum voltage drop of 3%. This size cable is rated to safely carry 148 amps while meeting the National Electrical Code (NEC) requirements. It's always best to consult the NEC and a qualified electrician to ensure compliance and safety for your specific application.
Does the NEC permit 2 wire Romex staple on edge?
Yes, the NEC permits 2-wire Romex staple on edge when installed properly. Staples should be positioned so that they do not damage the cable's insulation and are secure without over-compressing the cable. It is important to follow NEC guidelines for the correct installation of Romex cable to ensure safety.
What mandatory code establishes safety standards for installation cable?
National Electrical Code (NEC)
