The cables connecting the recording equipment to the transmitter must be protected by a continuous plastic-coated rust-protected steel sheath with crimped ends, except where an equivalent protection against manipulation is guaranteed by other means (for example by electronic monitoring such as signal encryption) capable of detecting the presence of any device which is unnecessary for the correct operation of the recording equipment and the purpose of which is to prevent the accurate operation of the recording equipment by short circuiting or interruption or by modification of the electronic data from the speed and distance sensor.
Ní mór na cáblaí lena nasctar an trealamh taifeadta leis an tarchuradóir a chosaint le truaill chruach mheirg-imdhíonach phlaisteach-bhrataithe le foircinn rocacha ach amháin má tá cosaint choibéiseach i gcoinne ionramhála á chinntiú trí mheáin eile (mar shampla trí fhaireachán amhail criptiú comharthaí) atá in ann aon fheiste a bhrath, nach bhfuil gá leis i gcomhair fheidhmiú ceart an trealaimh taifeadta agus a bhfuil mar aidhm aige feidhmiú cruinn an trealaimh taifeadta a chosc trí ghearrchiorcadadh nó trí idirscor nó tríd na sonraí leictreonacha ón mbraiteoir luais agus faid a mhodhnú.