Sentec AG, Ringstrasse 39, CH-4106 Therwil, Switzerland, www.sentec.com
HB-010103-e Date of release: 01/2022
12
4. Annex: Instructions for socket and wiring testing
(recommended)
As an additional means of protection, Sentec recommends performing a socket and wiring test prior to SDMS
installation to verify proper socket installation. The socket testing procedure must only be carried out by a
homecare provider’s instructed person.
The SDMS (including the isolation transformer) shall be connected to the tested socket only.
Check the socket for visual damages and make sure the socket is clean. Otherwise, the socket must
not be used. If in doubt, please contact a qualified electrician or your local Sentec representative.
Check the socket for verification of proper electrical wiring.
• Verify no wire is missing.
• Verify live / neutral are connected to L/N terminals (may be inverted).
• Verify protective earth is connected to the PE terminal (N/PE must not be inverted!)
- Voltage between protective earth and neutral shall not exceed 50V AC
- Voltage between protective earth and live shall be similar to mains voltage (e.g. 230V AC)
Note: A socket tester may be used. Simple (passive) testers acc. to below example are not able to
detect N/PE inverted. Make sure the tester is working properly before testing. Do not leave the
tester with the patient.
The socket must not be used if it does not meet above criteria. If in doubt, please contact a qualified
electrician or your local Sentec representative.
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