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How do we calculate the cable size for electrical installations?
Wiki User
∙ 12y ago
Electrical wire size is directly dependant on the load amperage that is connected to it. The higher the load amperage, the larger the cross sectional area of the wire needs to be. The connected amperage to a conductor is determined by a group of electrical experts and their results are then written into the latest addition of the electrical code book of the country in which you live.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoIt is determine by the load or amperage required.
15 amp = #14 wire
20 amp = #12
30 amp = #10
40 amp = #8
55 amp = #6
100 amp = #3
200 amps =#3/0
Wiki User
∙ 12y agoCable sizes for electrical installations are determined by the load current. The load current is obtained from the manufactures nameplate that is on the device to be connected. The electrical code book states what the amp capacity (ampacity) for specific wire sizes will be.
Wiki User
∙ 12y agoThe National Electric Code provides such information.
Wiki User
∙ 9y agoYou can measure its diameter using a micrometer.
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How do you calculate the current capacity of a cable when the cable size is known?
The current-carrying capacity of a cable depends on a number of things in addition to its cross-sectional area; these include the type of conductor, number of cores, type of insulation, whether or not it is armoured, method of installation, etc. Accordingly, to determine its current-carrying capacity, you will need to refer to your national electrical code. For example, in the UK, BS 7671:2008 Requirements for Electrical Installations contains tables for all standard cable types, specifying current-carrying capacity, voltage drops, etc.
What is the type and size of cable gland or 2 core cable?
To answer this question the size of the cable or the amperage of the load is needed to calculate the correct wire size and connectors to fit the cable.
What is electrical cable size for 18.5kw?
To answer this question the voltage is needed.
What size of wire use for 3kw motor 380volts 3phase?
How to calculate a cable size of 3kw motor
What cable size needed for 3KW geyser?
You need to know the amperage requirement of the pump and then you can calculate the wire size.
How do you calculate the current capacity of a cable when the cable size is known?
The current-carrying capacity of a cable depends on a number of things in addition to its cross-sectional area; these include the type of conductor, number of cores, type of insulation, whether or not it is armoured, method of installation, etc. Accordingly, to determine its current-carrying capacity, you will need to refer to your national electrical code. For example, in the UK, BS 7671:2008 Requirements for Electrical Installations contains tables for all standard cable types, specifying current-carrying capacity, voltage drops, etc.
How do you calculate cable gland size?
4cx95mm aws which size of cable gland
What is the type and size of cable gland or 2 core cable?
To answer this question the size of the cable or the amperage of the load is needed to calculate the correct wire size and connectors to fit the cable.
What is electrical cable size for 18.5kw?
To answer this question the voltage is needed.
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.
What size of wire use for 3kw motor 380volts 3phase?
How to calculate a cable size of 3kw motor
Could you Calculate cable size for 100 kw load?
Yes I could. How?
Where can find Electrical table for size of cable?
Electricians will use their electrical code book to fine these values.See related links below
What cable size needed for 3KW geyser?
You need to know the amperage requirement of the pump and then you can calculate the wire size.
How do you compute voltage drop and cable size over distance in the UK?
If you are referring to residential wiring, then refer to the appropriate tables in BS 7671:2008 Requirements for Electrical Installations (the IEE Wiring Regulations). It's too complicated to be answered in this forum and requires prerequesite knowledge you may not have.
When is wire size an electrical hazards?
Wire size becomes an electrical hazard when it is under rated for the amount of current (Amps or I) it has to carry.Current is the flow of electrons in a circuit. If the current is too large for the cable, the cable will be subject to heating, which is a possible fire hazard.
For 100kw which cable size is good and how to find out cable size?
100 kw is the power drawn by the load. to calculate the cable size you need to know the voltage. From that you can calculate the current. this decides the cable size. for example if the voltage is 400Volts then the current flowing in the circuit when the load is 100 KW will be 250 amps. (100,000/400). for 250 amps to flow with out causing excessive heating of the cable the cross sectional area of the copper cable should be 150 sq mm.for a round cross section the diameter will be roughly 15mm.
