7500W heats up water heater continuously, can not use 4 square copper cash when individual report; 4 square copper cash can be used when three-phase report.
Say how to choose electrical wiring according to power to everybody above all:
- The basic measure that electrical wiring chooses is will calculate by power an electric current, choose electrical wiring according to electric current; Electric water heater is pure resistor electric equipment, we are OK and so direct will calculate according to UI of formulary P ＝ P/U of voltaic I ＝ ; Next according to I of computational electric current, will choose electrical wiring.
The first kind of use circumstance namely 220V voltage power supply:
- Determine use condition first, the individual report of 220V, wear a canal dark lay inside the canal, use temperature is normal temperature, use distance is taken no account of; The electrical wiring current-carrying capacity above the basis is expressed, consult use condition is wearing plastic pipe namely, when 3 electrical wiring are being worn inside, the current-carrying capacity of 4 square copper cash is 28A; 4 square electrical wiring bears the weight of power, according to 6160W of ＝ of 28A of × of 220V of ＝ of UI of formulary P ＝ ; So 4 square copper cash is below use condition above cannot bear the weight of quite of the straight hot water heater of 7500W.
The 2nd kind of use circumstance namely 380V voltage power supply:
- Determine use condition first likewise, the individual report of 380V, wear a canal dark lay inside the canal, use temperature is normal temperature, use distance is taken no account of; The electrical wiring current-carrying capacity above the basis is expressed, consult use condition is wearing plastic pipe namely, at this moment inside should press when wearing 4 electrical wiring, the current-carrying capacity of 4 square copper cash is 25A; 4 square electrical wiring bears the weight of power, according to ＝ of 1.732UI of formulary P ＝ 16454W of ＝ of 25A of × of 1.732 × 380V; So 4 square copper cash above three-phase phone is being used below use condition is to be able to bear the weight of of the straight hot water heater of 7500W.
The computation of integrated above, when we can see the straight hot water heater of 7500W is using individual phone, the copper cash of 4 square is to take what do not rise; When use three-phase report, 4 square copper cash can be brought.
About the straight hot water heater of 7500W, whether the issue that uses 4 square copper cash lives in miscellaneous altar to be analysed to everybody, the hope can help great master, if insufficient place welcomes everybody to leave a message,discuss! Still adjure everybody to pay close attention to household miscellaneous altar finally, reside miscellaneous altar to nod assist to comment on transmit to the home more, thank extremely!
