Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Don Y <blockedofcourse@foo.invalid>
Newsgroups: sci.electronics.design
Subject: Re: EMC compliance question
Date: Sun, 13 Oct 2024 12:42:37 -0700
Organization: A noiseless patient Spider
Lines: 17
Message-ID: <veh7rf$qb7k$1@dont-email.me>
References: <67070ba9$1$1783$882e4bbb@reader.netnews.com>
 <ve9e5c$39rmc$1@dont-email.me> <dsfggj1a5m9mise9781qmh1roqv3pb68jr@4ax.com>
 <gtcjgjlhuspq5aktltgrebvgdcqgkgvk36@4ax.com> <vedg2l$440i$2@dont-email.me>
 <58blgjlombhmiactsd6ln18hue785qhas6@4ax.com>
 <tbrngjdmfmpkdj8q9nh9j2h84llf8lrvju@4ax.com> <veh7cm$pvib$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sun, 13 Oct 2024 21:42:40 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="cde96a4c32d213d705bbea52035ee477";
	logging-data="863476"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19V3pfPOxTcEdcYpot9INUK"
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:102.0) Gecko/20100101
 Thunderbird/102.2.2
Cancel-Lock: sha1:t3Faqu3O/2Dp2XCWCmyJ8/SX5e4=
In-Reply-To: <veh7cm$pvib$1@dont-email.me>
Content-Language: en-US
Bytes: 1920

On 10/13/2024 12:34 PM, Klaus Vestergaard Kragelund wrote:
>> Telecom standards tend to mirror BellCore regs.
>
> And thinking about that, the ringing voltage was close to 100Vrms, and using 
> flimsy connectors. Amazing that was legal

90Vrms with ~48Vdc talking battery

OTOH, there was a single manufacturer and provider, way back when.
It was a big deal when you could do your own wiring, provide your
own equipment, etc.

But, even HVAC wiring is 24Vac -- as "were" doorbell annunciators.

[I suspect the "wired pushbutton" for garage door openers is now
< 12V]