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What are good conductors that you might find at a typical barbecue?
any metal at a bbq is a conducter along with water
Good conductors of electricity are often good conductors of heat?
Generally speaking, materials that are good conductors of heat are good conductors of electricity. But there is a notable exception. Diamond, an allotrope of carbon, conducts heat better than any metal, but it is an electrical insulator.
Are insulators dull brittle and poor conductors?
Insulators are conductors
What type of resistance do conductors have?
Conductors have a (low) Electrical resistance.
What are some good conductors and bad ones?
Good Electrical conductors: All metals, ionic substances (in solution or molten form) Bad Electrical conductors: Water Good Heat conductors: All Metals Bad Heat Conductors: Water
What determines the ampacity of wire?
Conductors must have an ampacity not less than the maximum load that they are supplying.
What determine the ampacity of a wire?
Conductors must have an ampacity not less than the maximum load that they are supplying.
What is the ampacity of a NM-B cable?
Allowable ampacity for 10-2 copper NM-B is 30 A.http://www.cerrowire.com/default.aspx?id=46
If ther are more than conductors in the raceway the ampacity of the conductors must be derated?
Ampacity must be derated depending on the number of conductors and the ambient temperature. In the Canadian Electrical Code Table 5C denotes derating for the number of conductors. 1-3 conductors = 100% load 4-6 conductors = 80% 7-24 conductors = 70% 25-42 conductors = 60% 43 or more conductors = 50%
Allowable ampacity of 10 copper thin wire rated at 75 degree Celsius?
Isn't it 35, according to the NEC 310.15(B)(16) Table.
You have 3 sets of conduits with 6 500MCM conductors in each one what is your ampacity?
The ampacity of 500 MCM R 90 degree wire is 395 amps. Don't forget to de-rate the wire as there are more that three conductors in a raceway.
What is the ampacity of the 14 conductors in the conduit application?
14 AWG copper conductors are limited in the NEC to 15 amps. You must protect them with an overcurrent device such as a breaker or fuse not exceeding 15 amps.
Why are conductors needed?
If you want to operate the conductors maximum capacity, the conductor needs the heat, that the amperage produces, to be dissipated. This is why in the electrical code book there are two amperage ratings. The first one is for a free air rating which allows for a high ampacity of the wire. The other rating is for three conductors in a conduit which confines the cooling capacity and so the ampacity rating of these wires is lowered. The same procedure is used in cable spacings in ladder tray networks.
What has the author Vincent T Morgan written?
Vincent T. Morgan has written: 'Thermal behaviour of electrical conductors' -- subject(s): Bus conductors (Electricity), Conduction, Electric cables, Electric conductors, Heat, Overhead electric lines, Powerline ampacity, Thermal properties
Continuous loads are calculated at what percenteage of the connected load?
"... the rating of the overcurrent device shall not be less than the non-continuous load plus 125% of the continuous load." NEC 2008 Article 210.20(A) Furthermore, the ampacity of the conductor must be derated to 80% of allowable ampacity as stated in Table 310.16. Please take note of the exception to the table for #14 AWG, #12 AWG, and #10 AWG in Article 240.4(D) which automatically derates small conductors such as these to 15A, 20A, and 30A respectively. Also be aware of all other ampacity derating that may be required by Article 310 and Article 422.
How do you determine the number of conductors per phase?
The number of conductors is simply the service amperage divided by the desired wire size's ampacity rounded up if there is a remainder. Example: 1000A service, using 300kcmil conductors at 75 deg C: 300kcmil ampacity in this situation is 285. 1000/285=3.5 Since you can't have 3.5 conductors, you must round up to 4. This would give you a total ampacity of 285A x 4, or 1140A. If you're rounding farther than necessary, such as in this case, you can try using the next smallest conductor and adding another set to closer match your required ampacity. 250kcmil ampacity is 255. 1000/255=3.92 We will also round this up to 4, but we aren't rounding as far as the earlier example. The total ampacity is now 1020. 250kcmil x 4 sets is probably the best arrangement for this 1000A service. You could use larger wire and fewer sets, but smaller wire is more cost effective for both ampacity per pound and labor costs for installation.
How do you run 4 prong 240 volt outlet?
you must run the proper size wire based on the ampacity needed, wire must have four conductors including the gound
