Hi Joe:
Some points:
1. The 60-volts need not be isolated from the low voltage; it has a
common point (ground) which is better. The lone (not both) 60-volt
conductor and circuit components should be double-insulated from accessible
conductive parts.
2. Please note that the
Greetings team members,
I seem to recall somewhere either in a directive or the blue guide where it
states (or implies) that part of the CE marking requirements entails that
the manufacture must have a product quality system/production
control..and this is where I need clarification:
Hi Pete:
Over the years I have periodically been asked to troubleshoot problems with 60
Hz harmonics appearing in the audio signals of telecom equipment. The culprit
is usually the type of EMC caps that you refer to.
The easy-to-understand case is when two conventional Y-caps are
Scott et al, You are correct in that there seems to be a split between
electrical appliances and electronic equipment and that the latter is more
Class II than the former, there is chatter about an issue that is growing among
class II equipments. All of the electronic equipment which
Hi Josh:
Yes, you are correct. Both of these standards specify the equipment be Class
I.
60335-2-38 applies to commercial-use griddles. 60335-2-75 applies to
commercial food or drink dispensing equipment.
Thanks, and best regards,
Rich
From: Wiseman, Joshua
Sent:
It’s been a few years, but I seem to recall there was a particular IEC/EN
60335-2-xx standard that required tubular sheathed heaters to be grounded.
This would force PE to be brought in.
Additionally, IEC 60335-2-38 and IEC 60335-2-75 have requirements for
Equipotential grounding. If I
Hi Scott:
I have seen no safety standards or codes that specify which products must be
Class I and which products must be Class II, except in the USA washers and
dryers must be Class I. As far as I know, the decision is that of the
manufacturer. I have been associated with a
Hi Rich:
Thanks, I think I am starting to better understand my options. Following is
my current understanding:
1) If the internal non-SELV circuit does not meet the requirements in
clause 8.1.4 for "protective impedance," the product will be Class 2 per
clause 3.3.10 and double
In terms of safety level, both constructions are given the equivalent
protection against electric shock. In electrical appliances, Class I is
used most whereas Class II is employed in most electronic products. Is
there any background for such design route?
In some cases such as induction
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