一、什么是弱電？   弱電一般是指直(zhi)流電路(lu)(lu)或音頻、視(shi)頻線路(lu)(lu)、網絡(luo)線路(lu)(lu)、電話線路(lu)(lu)，直(zhi)流電壓一般在32V以(yi)內。家用電氣中的電話、電腦、電視(shi)機的信號(hao)輸(shu)入（有線電視(shi)線路(lu)(lu)）、音響設(she)(she)備(bei)(bei)（輸(shu)出端線路(lu)(lu)）等用電器均(jun)為弱電電氣設(she)(she)備(bei)(bei)。

二(er)、什么(me)是強(qiang)電(dian)(dian)？   強(qiang)電(dian)(dian)指電(dian)(dian)工領(ling)域的(de)(de)電(dian)(dian)力(li)(li)部分。特點是功率大、電(dian)(dian)流大、頻率低，主(zhu)要(yao)考(kao)慮損耗小、效(xiao)率高的(de)(de)問題(ti)。和(he)弱電(dian)(dian)的(de)(de)關系(xi)很密切，與(yu)“弱電(dian)(dian)”相(xiang)對。   三、二(er)者有(you)何區(qu)別   強(qiang)電(dian)(dian)和(he)弱電(dian)(dian)主(zhu)要(yao)區(qu)別是用(yong)(yong)途的(de)(de)不(bu)同。強(qiang)電(dian)(dian)是用(yong)(yong)作一種動力(li)(li)能源，弱電(dian)(dian)是用(yong)(yong)于信(xin)息傳遞。

強電(dian)(dian)(dian)(dian)(dian)和(he)弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)從(cong)概念(nian)上講，一般(ban)是(shi)容易區別(bie)(bie)的(de)(de)(de)(de)(de)，主(zhu)要區別(bie)(bie)是(shi)用(yong)途的(de)(de)(de)(de)(de)不同(tong)。強電(dian)(dian)(dian)(dian)(dian)是(shi)用(yong)作一種動力(li)能(neng)源，弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)是(shi)用(yong)于(yu)信息(xi)傳(chuan)(chuan)遞。家(jia)庭電(dian)(dian)(dian)(dian)(dian)路(lu)分(fen)為強電(dian)(dian)(dian)(dian)(dian)和(he)弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)。在電(dian)(dian)(dian)(dian)(dian)力(li)系統中，36V以(yi)(yi)下(xia)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)稱為安全電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，1kV以(yi)(yi)下(xia)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)稱為低壓(ya)(ya)(ya)(ya)(ya)(ya)，1kV以(yi)(yi)上的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)稱為高壓(ya)(ya)(ya)(ya)(ya)(ya)，直接供電(dian)(dian)(dian)(dian)(dian)給(gei)用(yong)戶的(de)(de)(de)(de)(de)線路(lu)稱為配(pei)電(dian)(dian)(dian)(dian)(dian)線路(lu)，如用(yong)戶電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)為380/220V，則稱為低壓(ya)(ya)(ya)(ya)(ya)(ya)配(pei)電(dian)(dian)(dian)(dian)(dian)線路(lu)，也就(jiu)是(shi)家(jia)庭裝修中所說(shuo)的(de)(de)(de)(de)(de)強電(dian)(dian)(dian)(dian)(dian)。   強電(dian)(dian)(dian)(dian)(dian)與弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)是(shi)相對的(de)(de)(de)(de)(de)概念(nian)，從(cong)概念(nian)上講，主(zhu)要區別(bie)(bie)是(shi)用(yong)途的(de)(de)(de)(de)(de)不同(tong)，而不能(neng)單純(chun)的(de)(de)(de)(de)(de)以(yi)(yi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)大(da)小來(lai)界定兩(liang)者關(guan)系(如果非(fei)要指定用(yong)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)區分(fen)的(de)(de)(de)(de)(de)話，那就(jiu)把(ba)36V(人(ren)體安全電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya))以(yi)(yi)上劃(hua)定為強電(dian)(dian)(dian)(dian)(dian), 36V(人(ren)體安全電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya))以(yi)(yi)下(xia)為劃(hua)定為弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)。) ，兩(liang)者既(ji)有聯系又有區別(bie)(bie)，一般(ban)區分(fen)原則是(shi)：強電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)處(chu)理對象是(shi)能(neng)源（電(dian)(dian)(dian)(dian)(dian)力(li)），其特點(dian)是(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)高、電(dian)(dian)(dian)(dian)(dian)流(liu)大(da)、功率(lv)(lv)大(da)、頻率(lv)(lv)低，主(zhu)要考慮的(de)(de)(de)(de)(de)問題(ti)是(shi)減少損耗(hao)、提高效率(lv)(lv)，弱(ruo)(ruo)電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)處(chu)理對象主(zhu)要是(shi)信息(xi)，即信息(xi)的(de)(de)(de)(de)(de)傳(chuan)(chuan)送和(he)控(kong)制，其特點(dian)是(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)低、電(dian)(dian)(dian)(dian)(dian)流(liu)小、功率(lv)(lv)小、頻率(lv)(lv)高，主(zhu)要考慮的(de)(de)(de)(de)(de)是(shi)信息(xi)傳(chuan)(chuan)送的(de)(de)(de)(de)(de)效果問題(ti)，如信息(xi)傳(chuan)(chuan)送的(de)(de)(de)(de)(de)保(bao)真度(du)、速度(du)、廣度(du)、可(ke)靠性。

它(ta)們大致(zhi)有如(ru)下區別：

（1）交流頻(pin)(pin)率不同  強電的(de)頻(pin)(pin)率一般(ban)是(shi)50Hz（赫），稱“工(gong)頻(pin)(pin)”，意即工(gong)業用電的(de)頻(pin)(pin)率：弱電的(de)頻(pin)(pin)率往(wang)往(wang)是(shi)高頻(pin)(pin)或(huo)特高頻(pin)(pin)，以kHz（千赫）、MHz（兆赫）計。

（2）傳(chuan)輸(shu)方式不(bu)同(tong)  強(qiang)電(dian)(dian)以輸(shu)電(dian)(dian)線路傳(chuan)輸(shu)，弱電(dian)(dian)的(de)傳(chuan)輸(shu)有(you)有(you)線與無(wu)線之分。無(wu)線電(dian)(dian)則以電(dian)(dian)磁波(bo)傳(chuan)輸(shu)。   （3）功(gong)率、電(dian)(dian)壓(ya)及電(dian)(dian)流(liu)大小不(bu)同(tong)  強(qiang)電(dian)(dian)功(gong)率以kW（千(qian)瓦(wa)(wa)）、MW（兆瓦(wa)(wa)）計(ji)、電(dian)(dian)壓(ya)以V（伏(fu)）、kV（千(qian)伏(fu)）計(ji)，電(dian)(dian)流(liu)以A（安(an)）、kA（千(qian)安(an)）計(ji)；弱電(dian)(dian)功(gong)率以W（瓦(wa)(wa)）、mW（毫瓦(wa)(wa)）計(ji)，電(dian)(dian)壓(ya)以V（伏(fu)）、mV（毫伏(fu)）計(ji)，電(dian)(dian)流(liu)以mA（毫安(an)）、uA（微安(an)）計(ji)，因而其電(dian)(dian)路可以用印(yin)刷電(dian)(dian)路或集成(cheng)電(dian)(dian)路構成(cheng)。