一、什么是弱電(dian)？   弱電(dian)一般(ban)是指直流電(dian)路或音頻(pin)、視(shi)(shi)頻(pin)線路、網絡線路、電(dian)話線路，直流電(dian)壓一般(ban)在32V以內。家用電(dian)氣(qi)中的(de)電(dian)話、電(dian)腦、電(dian)視(shi)(shi)機的(de)信號輸(shu)入（有線電(dian)視(shi)(shi)線路）、音響(xiang)設(she)(she)備(bei)（輸(shu)出端線路）等用電(dian)器(qi)均為弱電(dian)電(dian)氣(qi)設(she)(she)備(bei)。

二、什么是(shi)強(qiang)電(dian)(dian)？   強(qiang)電(dian)(dian)指電(dian)(dian)工(gong)領域(yu)的電(dian)(dian)力部分。特點是(shi)功率(lv)大、電(dian)(dian)流(liu)大、頻率(lv)低，主要(yao)考慮損耗小、效率(lv)高的問(wen)題。和(he)弱(ruo)(ruo)電(dian)(dian)的關系很(hen)密切，與“弱(ruo)(ruo)電(dian)(dian)”相對。   三、二者有何區(qu)別   強(qiang)電(dian)(dian)和(he)弱(ruo)(ruo)電(dian)(dian)主要(yao)區(qu)別是(shi)用途的不同(tong)。強(qiang)電(dian)(dian)是(shi)用作一種動力能(neng)源，弱(ruo)(ruo)電(dian)(dian)是(shi)用于信息傳遞。

強電(dian)(dian)(dian)(dian)(dian)(dian)和弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)從(cong)概(gai)念(nian)(nian)(nian)上(shang)講(jiang)，一般(ban)是(shi)(shi)容易區(qu)別的(de)(de)(de)(de)(de)，主(zhu)(zhu)要(yao)區(qu)別是(shi)(shi)用(yong)(yong)途的(de)(de)(de)(de)(de)不同。強電(dian)(dian)(dian)(dian)(dian)(dian)是(shi)(shi)用(yong)(yong)作一種動力能(neng)源(yuan)(yuan)，弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)是(shi)(shi)用(yong)(yong)于信息(xi)(xi)傳遞。家庭電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)分為(wei)(wei)(wei)強電(dian)(dian)(dian)(dian)(dian)(dian)和弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)。在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)力系統中，36V以(yi)下的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)稱(cheng)為(wei)(wei)(wei)安全(quan)(quan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，1kV以(yi)下的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)稱(cheng)為(wei)(wei)(wei)低(di)壓(ya)(ya)，1kV以(yi)上(shang)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)稱(cheng)為(wei)(wei)(wei)高壓(ya)(ya)，直接供電(dian)(dian)(dian)(dian)(dian)(dian)給(gei)用(yong)(yong)戶(hu)的(de)(de)(de)(de)(de)線(xian)路(lu)稱(cheng)為(wei)(wei)(wei)配電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)路(lu)，如(ru)用(yong)(yong)戶(hu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)為(wei)(wei)(wei)380/220V，則稱(cheng)為(wei)(wei)(wei)低(di)壓(ya)(ya)配電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)路(lu)，也就(jiu)是(shi)(shi)家庭裝修中所說的(de)(de)(de)(de)(de)強電(dian)(dian)(dian)(dian)(dian)(dian)。   強電(dian)(dian)(dian)(dian)(dian)(dian)與弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)是(shi)(shi)相對(dui)的(de)(de)(de)(de)(de)概(gai)念(nian)(nian)(nian)，從(cong)概(gai)念(nian)(nian)(nian)上(shang)講(jiang)，主(zhu)(zhu)要(yao)區(qu)別是(shi)(shi)用(yong)(yong)途的(de)(de)(de)(de)(de)不同，而不能(neng)單純的(de)(de)(de)(de)(de)以(yi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)大小(xiao)來界(jie)定(ding)(ding)(ding)兩者關系(如(ru)果(guo)非要(yao)指定(ding)(ding)(ding)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)區(qu)分的(de)(de)(de)(de)(de)話，那就(jiu)把36V(人體安全(quan)(quan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya))以(yi)上(shang)劃(hua)定(ding)(ding)(ding)為(wei)(wei)(wei)強電(dian)(dian)(dian)(dian)(dian)(dian), 36V(人體安全(quan)(quan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya))以(yi)下為(wei)(wei)(wei)劃(hua)定(ding)(ding)(ding)為(wei)(wei)(wei)弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)。) ，兩者既有(you)聯(lian)系又(you)有(you)區(qu)別，一般(ban)區(qu)分原(yuan)則是(shi)(shi)：強電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)處(chu)理(li)對(dui)象是(shi)(shi)能(neng)源(yuan)(yuan)（電(dian)(dian)(dian)(dian)(dian)(dian)力），其(qi)特(te)點是(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)高、電(dian)(dian)(dian)(dian)(dian)(dian)流大、功(gong)率(lv)大、頻率(lv)低(di)，主(zhu)(zhu)要(yao)考慮的(de)(de)(de)(de)(de)問題是(shi)(shi)減少(shao)損(sun)耗、提高效(xiao)率(lv)，弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)處(chu)理(li)對(dui)象主(zhu)(zhu)要(yao)是(shi)(shi)信息(xi)(xi)，即(ji)信息(xi)(xi)的(de)(de)(de)(de)(de)傳送(song)和控制(zhi)，其(qi)特(te)點是(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)低(di)、電(dian)(dian)(dian)(dian)(dian)(dian)流小(xiao)、功(gong)率(lv)小(xiao)、頻率(lv)高，主(zhu)(zhu)要(yao)考慮的(de)(de)(de)(de)(de)是(shi)(shi)信息(xi)(xi)傳送(song)的(de)(de)(de)(de)(de)效(xiao)果(guo)問題，如(ru)信息(xi)(xi)傳送(song)的(de)(de)(de)(de)(de)保真度(du)、速度(du)、廣度(du)、可靠性(xing)。

它們大致有如下區(qu)別：

（1）交流頻(pin)(pin)率(lv)不同  強(qiang)電(dian)(dian)的(de)頻(pin)(pin)率(lv)一(yi)般是50Hz（赫(he)(he)），稱“工(gong)頻(pin)(pin)”，意(yi)即工(gong)業用電(dian)(dian)的(de)頻(pin)(pin)率(lv)：弱電(dian)(dian)的(de)頻(pin)(pin)率(lv)往往是高頻(pin)(pin)或特(te)高頻(pin)(pin)，以kHz（千赫(he)(he)）、MHz（兆赫(he)(he)）計。

（2）傳輸(shu)方式(shi)不(bu)同(tong)  強電(dian)(dian)(dian)以輸(shu)電(dian)(dian)(dian)線(xian)路(lu)(lu)傳輸(shu)，弱電(dian)(dian)(dian)的(de)傳輸(shu)有有線(xian)與無線(xian)之分。無線(xian)電(dian)(dian)(dian)則(ze)以電(dian)(dian)(dian)磁波傳輸(shu)。   （3）功率、電(dian)(dian)(dian)壓(ya)及電(dian)(dian)(dian)流(liu)大小不(bu)同(tong)  強電(dian)(dian)(dian)功率以kW（千(qian)瓦(wa)）、MW（兆瓦(wa)）計、電(dian)(dian)(dian)壓(ya)以V（伏(fu)）、kV（千(qian)伏(fu)）計，電(dian)(dian)(dian)流(liu)以A（安）、kA（千(qian)安）計；弱電(dian)(dian)(dian)功率以W（瓦(wa)）、mW（毫瓦(wa)）計，電(dian)(dian)(dian)壓(ya)以V（伏(fu)）、mV（毫伏(fu)）計，電(dian)(dian)(dian)流(liu)以mA（毫安）、uA（微(wei)安）計，因(yin)而其電(dian)(dian)(dian)路(lu)(lu)可以用印(yin)刷電(dian)(dian)(dian)路(lu)(lu)或集(ji)成電(dian)(dian)(dian)路(lu)(lu)構成。