Connections which the user has to handle, such as fluid, gas transfer, electrical or mechanical coupling, shall be designed and constructed in such a way as to minimise all possible risks, such as misconnection.
Aon nasc a chaithfidh an t-úsáideoir a láimhseáil, amhail sreabhán, aistriú gáis, nó cúpláil leictreach nó mheicniúil, dearfar agus déanfar é a thógáil sa chaoi go laghdófar a oiread is féidir gach riosca dá bhféadfadh a bheith ann, amhail nasc contráilte.