Ib qho kev sib kis ntauwd (tseem muaj hluav taws xob pylon, hydro ntauwd hauv Canada, thiab pylon hauv tebchaws Askiv) yog cov qauv siab, feem ntau yog ib lub pas nrig ua los ntawm cov hlau uas siv los txhawb txoj kab hluav taws xob overhead. Hauv cov phiaj xwm hluav taws xob, cov kav xa hluav taws xob muaj cov kab hluav taws xob loj uas thauj cov hluav taws xob ntau los ntawm cov chaw tsim hluav taws xob mus rau cov chaw hluav taws xob, los ntawm cov hluav taws xob xa mus rau cov neeg siv khoom kawg; Tsis tas li ntawd, cov ncej hluav taws xob tau siv los txhawb qis-voltage sub-transmissions thiab faib cov kab uas thauj hluav taws xob los ntawm cov chaw nres tsheb mus rau cov neeg siv hluav taws xob.

Muaj plaub pawg ntawm cov tuam tsev sib kis: (i) cov pej thuam ncua kev kawm, (ii) qhov kawg ntawm lub davhlau ya nyob twg, (iii) cov pej thuam nro, thiab (iv) cov pej thuam hloov chaw.[1] Qhov siab ntawm kev sib kis ntau ntawm 15 mus rau 55 m (49 txog 180 ft); [1] qhov siab tshaj plaws yog 380 m (1,247 ft) kis tau tus yees ntawm 2,656 m (8,714 ft) ncua sij hawm ntawm Jintang-Cezi Overhead Powerline Txuas , ntawm cov Islands tuaj Jintang thiab Cezi hauv Zhejiang xeev, Suav. Qhov ntev tshaj plaws ntawm kev hla dej yog Ameralik Span ntawm lub zog hla ntawm Ameralik fjord, nrog qhov ntev ntawm 5,376 m (17,638 ft). Yuav tsum muaj ntau qhov kev sib kis ntau ntxiv los txo cov kev hloov pauv huab cua, yog li xyoo 2020s kis tau tus yees tau dhau los ua kev nom kev tswv.

Cov kab sib kis feem ntau yog cais raws li cov duab, suav nrog hom iav, hom miv taub hau, hom sab sauv, hom qhuav thiab hom thoob. Raws li nws cov haujlwm, muaj cov kab sib txuas sib txuas ntauwd, ncua kev sib kis kab yees, lub kaum sab xis kis tau tus kheej, lub kaum sab xis kis tau tus kab ntauwd (tuag kawg yees), dej hla ntauwd, thiab lwm yam.