[Question] Will a 415v transformer work for a 400v machine

[Badabing]

Good day

Looking for any legal document/links etc to support the tolerance issue which are reasonable in the electrical trade and meet any regulatory standards.

Thanks in advance

[GCE]

Good day

Looking for any legal document/links etc to support the tolerance issue which are reasonable in the electrical trade and meet any regulatory standards.

Thanks in advance

SANS 10142-1 states voltage



5.4.2 Voltage
The equipment shall be suitable for operation on the maximum steady (r.m.s.)
voltage and overvoltage to which it is likely to be subjected. Equipment shall
be rated in accordance with the intended application for use on one of the
following voltages used in South Africa:
a) A.C. circuits:
1) standard voltages at a point of supply of Amdt 1
i) 230 V single-phase,
ii) 230/400 V three-phase four-wire, and
a tolerance of ± 10 % on these voltages.
NOTE For certain equipment it may be necessary to consider the lowest voltage
that is likely to occur.
2) declared voltages of 525 V three-phase three-wire is a commonly used
voltage and the tolerance is ± 5 %.
NOTE Declared voltage is the voltage declared by the manufacturer up to the
maximum of 1 000 V.
b) D.C. circuits:
1) preferred voltages of
i) 12 V,
ii) 24 V,
iii) 48 V,
2) other voltages of
i) 60 V,
ii) 80 V,
iii) 110 V,
iv) 220 V,
v) 250 V,
vi) 500 V, and
the tolerances on the above d.c. voltages are determined by the
application.
c) Voltages on control circuits should preferably not exceed 230 V a.c. or
110 V d.c.