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The most common system you will see is in the form:
"xx/y [type] [/w ground]" * xx is the wire size in the AWG system * y is the number of conductors. * Type THHN (for example) is the kind of wire insualtion. Romex (which is a brand name) is the regular plastic sheathed cable used 90% of the time in homes and commercial buidlings. * BX is metal sheathed cable. * /w ground means the cable has a ground wire.
* XX, the size, tells you how much current can flow through the wire, this is the primary consideration when choosing wire. * The voltage rating is also included. (typ 600V) meaning it is suitable for circuits up to 600V. * THHN, THXN, XHHW, etc, is the type of insulation. There are many of these for industrial wiring & should only be a concern if your wiring is outdoors, or installed in non typical environments.
* You will also see a temperature rating stamped in Deg C, 60, 75, & 90. This tells you the operating conditions under which the cable is suitable. Keep in mind that resistivity rises with temperature, so the hotter the area, the lower ampacity. Follow the link for further explanation.
To find required wire size for a certain amperage, use NEC Table 310.16.
Length and # of connections also add to the resistance, hence increasing amp draw; increasing wire size.
Length adds resistance which REDUCES amp draw.
Properly made connections do not add resistance.
You first find the connected amperage to the load. Then go the the electrical code book and look up that amperage and the wire size that is recommended. Then you look up the recommended size of a breaker to safely protect that wire.
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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 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 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 cable gland size?
4cx95mm aws which size of cable gland
How do you calculate the cable size for a run of 30 meters?
To calculate the cable size for a 30-meter run, you need to consider the current rating of the circuit, voltage drop limits, and the type of cable insulation. Use a cable sizing calculator or consult a professional electrician to determine the appropriate cable size to ensure safety and efficiency of the electrical installation.
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.
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 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?
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.
Where can find Electrical table for size of cable?
Electricians will use their electrical code book to fine these values.See related links below
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.
Size 134 kva cable?
A 134 kVA cable typically refers to the size of cable required for a 134 kilovolt-ampere electrical load. The size of the cable needed will depend on factors such as the length of the cable run, the voltage drop allowed, and the type of insulation and conductor material required to safely carry the current. It is recommended to consult with a qualified electrical engineer or contractor to determine the specific cable size needed for your application.
