<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
</head>
<body>
<div dir="auto">Could it be a UL rating issue?</div>
<div dir="auto"><br>
</div>
<div dir="auto">UL rating for electrical components is very different to IEC and AS/NZS.</div>
<div dir="auto"><br>
</div>
<div id="ms-outlook-mobile-body-separator-line" dir="auto"></div>
<div id="ms-outlook-mobile-signature" dir="auto">
<div dir="auto">Tony</div>
</div>
<div dir="auto" id="mail-editor-reference-message-container"><br>
<hr style="display: inline-block; width: 98%;">
<div id="divRplyFwdMsg" style="font-size: 11pt;" dir="auto"><b>From:</b> AusNOG <ausnog-bounces@lists.ausnog.net> on behalf of Alex Samad <alex@samad.com.au><br>
<b>Sent:</b> Tuesday, April 8, 2025 4:48:41 pm<br>
<b>To:</b> Ausnog <ausnog@lists.ausnog.net><br>
<b>Subject:</b> [AusNOG] Fwd: Derating of PDU<br>
</div>
<br>
<div dir="auto" class="gmail_quote gmail_quote_container">Hi</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container">I'm having the pleasure of looking at PDU's and trying to standardise over US / UK / Japan / Aus</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container">Something I didn't know was the standard in the US for derating electrical devices. whilst I normally plan for max normal draw of around 80% of rating. seems like PDU for USA have a derating value.</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container">So I am seeing 30amp @ 230v in and line rating of 24amp and max 30amp. The notes seems to suggest you can go over 24 amps but only for a very short period of time - seems like minutes.</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container">This seems a bit of a pain for me - whilst I wouldn't normally run over the 24 amps there have been times i have had to run over - but under 30 for days if not a couple of weeks.</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container">Currently I'm trying to order into japan (omg), lot of their stuff is imported which means it comes with the USA specs. so 24/30 amp setup.. Interestingly also noted that when you read the fine prints
its actually 2 x 20amp breakers - 1 breaker per bank .. PDU has 2 banks</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container">I can't find anything about derating for Aus - do we not do it in Aus or mandate it ?</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container"><br>
</div>
<div dir="auto" class="gmail_quote gmail_quote_container">Alex</div>
<br>
</div>
</body>
</html>