• A wash­ing machine, an elec­tric heat­ed tow­el rail and a water heater are often installed in the bath­room. Often, many apart­ment own­ers also install an elec­tric floor heat­ing sys­tem in the room, pur­chase hot tubs and show­er pan­els, and some­times even spe­cial audio and video sys­tems.

    Low-pow­er appli­ances (for exam­ple, light­ing), in prin­ci­ple, can be con­nect­ed through a step-down trans­former, but in prac­tice, house­hold appli­ances are always pow­ered from a 220 V net­work. Such equip­ment is a poten­tial haz­ard, espe­cial­ly dur­ing water pro­ce­dures, when the humid­i­ty ris­es sharply in the room, con­den­sa­tion will form and sock­ets and switch­es may be splashed with water.

    To pro­tect your­self from neg­a­tive con­se­quences, includ­ing elec­tric shock and a short cir­cuit that can lead to a fire, a sep­a­rate, always ground­ed elec­tri­cal line should be laid in the bath­room.

    Automatic machines and RCDs

    The chain must be pro­tect­ed. First­ly, a cir­cuit break­er (AB, or auto­mat­ic), and sec­ond­ly, a resid­ual cur­rent device (RCD). The RCD is con­trolled by dif­fer­en­tial (resid­ual) cur­rent, that is, it works in case of leak­age and thus helps to pro­tect the apart­ment and its inhab­i­tants.

    Separator variant

    The rat­ed cur­rent of the cir­cuit break­er and the oper­at­ing cur­rent of the RCD are select­ed based on the pow­er of the devices. For exam­ple, a cir­cuit that feeds a wash­ing machine with a pow­er of up to 1.5–2 kW is equipped with a 10 A auto­mat­ic device and an RCD with a rat­ed cur­rent of at least 10 mA. How­ev­er, under no cir­cum­stances should the trip­ping cur­rent of the RCD exceed 30 mA.

    Instead of two devices, you can install one com­bined — RCD with built-in over­cur­rent pro­tec­tion (dif­fer­en­tial machine).

    How to choose the right RCD and differential machine

    When choos­ing an RCD or dif­fer­en­tial machine, pay atten­tion to its type. To pro­tect the out­let to which it is planned to con­nect a wash­ing machine or oth­er instal­la­tion with an invert­er motor, as well as any equip­ment with an elec­tron­ic pow­er sup­ply, it is nec­es­sary to use type A RCD accord­ing to GOST R 60755–2012. Only such devices respond to the pul­sat­ing DC leak­age cur­rent that can occur in cir­cuits with work­ing mod­ern house­hold appli­ances, a lap­top and a TV.

    When choos­ing, pay atten­tion to trust­ed brands such as Schnei­der Elec­tric. The range of the brand includes high-qual­i­ty RCDs and type A dif­fer­en­tial automa­ta — in the Acti 9 and Easy 9 series of mod­u­lar devices.

    Protected sockets and switches

    Anoth­er impor­tant aspect of elec­tri­cal safe­ty in the bath­room is the use of sock­ets and switch­es that have the required degree of pro­tec­tion against water (IP).

    The min­i­mum require­ment for elec­tri­cal instal­la­tion prod­ucts is IP44 (water splash­es are allowed), rec­om­mend­ed is IP 55 (water jets are allowed).

    One hun­dred per­cent safe­ty will be ensured by devices with a high degree of mois­ture pro­tec­tion. For exam­ple, sock­ets and switch­es Mure­va Styl (Schnei­der Elec­tric), which are equipped with spring-loaded shut­ters, seals and a spe­cial arrange­ment of fas­ten­ers. The series includes both built-in and over­head devices.

    Mureva Styl series sockets (Schneider Electric) have ...
    Dar­iusz Jarzabek/Fotolia.com

    Where to install sockets

    Accord­ing to GOST R 50571.7.701‑2013, sock­ets with a volt­age of 220 V can be installed no clos­er than 60 cm hor­i­zon­tal­ly from the font (show­er tray) and the area locat­ed direct­ly above the plumb­ing equip­ment.

    As an adver­tise­ment