<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>CR4 - Recent Forum Threads and Blog Entries</title><link>https&#x3a;&#x2f;&#x2f;cr4.globalspec.com</link><description><![CDATA[Recent content from CR4, The Engineer&#x27;s Place for News and Discussion]]></description><copyright>Copyright 2026</copyright><pubDate>Wed, 03 Jun 2026 14:54:05 EST</pubDate><generator>https&#x3a;&#x2f;&#x2f;cr4.globalspec.com</generator><item><title><![CDATA[Miniature Circuit Breakers &#x28;MCB&#x29;]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151548&#x2f;Miniature-Circuit-Breakers-MCB&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[For Industrial Switchgears, VFDs, the MCBs &#x28;Miniature circuit breaker&#x29; according to IEC 60898-1 can be used satisfying the short circuit requirements or only MCBs according IEC 60947-2 is acceptable&#x3f;&#xa;&#xa;This is to be used only in the control circuits.]]></description><pubDate>Wed, 03 Jun 2026 14&#x3a;54&#x3a;05 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151548&#x2f;Miniature-Circuit-Breakers-MCB]]></guid><dc:creator>Selk</dc:creator><dc:subject>Engineering Projects</dc:subject></item><item><title><![CDATA[Statimeter M5537 for ISO pumps]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151545&#x2f;Statimeter-M5537-for-ISO-pumps&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[Hi&#x21; I have limited knowledge about this instrument, all information available to me is this picture, model &#x23; - M5537, that it is a Statimeter, it is hydraulic measurement instrument and it is made spesificaly for ISO pumps. Other than that, I am pretty sure the thing is really dated, so if there i]]></description><pubDate>Tue, 02 Jun 2026 08&#x3a;24&#x3a;43 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151545&#x2f;Statimeter-M5537-for-ISO-pumps]]></guid><dc:creator>Leyla Alizade</dc:creator><dc:subject>General Discussion</dc:subject></item><item><title><![CDATA[Form 4A - LV Panel - Rotary handle]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151544&#x2f;Form-4A-LV-Panel-Rotary-handle&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[If it is Form 4A &#x28;Form of Separation for LV distribution boards&#x29;, does this automatically mean that rotary handles are provided on the DB door to operate the MCCB&#x3f;]]></description><pubDate>Tue, 02 Jun 2026 04&#x3a;21&#x3a;31 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151544&#x2f;Form-4A-LV-Panel-Rotary-handle]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Emergency Light Fixture]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151543&#x2f;Emergency-Light-Fixture&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[For emergency light fixtures,&#xa;&#xa;1&#x29; Combining both the power cable and the charging cable in the same cable &#x28;Multi core&#x29; acceptable&#x3f; &#x28;refer magenta line in the picture&#x29;&#xa;&#xa;2&#x29; Taking power for charging from the separate circuit breaker acceptable&#x3f; any disadvantage in it&#x3f; &#x28;refer yellow line in the picture]]></description><pubDate>Mon, 01 Jun 2026 14&#x3a;04&#x3a;45 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151543&#x2f;Emergency-Light-Fixture]]></guid><dc:creator>Selk</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Which Stainless Steel Round Bar Grades Are Most Reliable for Industrial and Marine Applications&#x3f;]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151534&#x2f;Which-Stainless-Steel-Round-Bar-Grades-Are-Most-Reliable-for-Industrial-and-Marine-Applications&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[We are currently sourcing stainless steel round bars for industrial fabrication and marine-related applications. There are many grades available like SS 304, 316, 410, and duplex grades, but selecting the right one depends on corrosion resistance, strength, machinability, and long-term durability.]]></description><pubDate>Wed, 27 May 2026 04&#x3a;00&#x3a;21 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151534&#x2f;Which-Stainless-Steel-Round-Bar-Grades-Are-Most-Reliable-for-Industrial-and-Marine-Applications]]></guid><dc:creator>Sagar_p</dc:creator><dc:subject>Manufacturing</dc:subject></item><item><title><![CDATA[Arc Flash and IP Rating]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151514&#x2f;Arc-Flash-and-IP-Rating&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[What is the minimum IP rating required for an enclosure to direct the exhaust of extremely hot gases from an internal arcing event away from personnel&#x3f;&#xa;&#xa;&#x28;or&#x29;&#xa;&#xa;In the case of a non arc rated enclosure, which IP rating provides optimal protection against arc flash for personnel in the vicinity&#x3f;]]></description><pubDate>Mon, 11 May 2026 15&#x3a;41&#x3a;48 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151514&#x2f;Arc-Flash-and-IP-Rating]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[A Simple Tolerance Change That Can Significantly Reduce Manufacturing Cost]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151513&#x2f;A-Simple-Tolerance-Change-That-Can-Significantly-Reduce-Manufacturing-Cost&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[In many projects, one of the biggest cost drivers is unnecessarily tight tolerances.&#xa;&#xa;For example, changing a machining tolerance from &#x26;plusmn&#x3b;0.005 mm to &#x26;plusmn&#x3b;0.02 mm can often reduce cycle time and cost substantially, while still meeting all functional requirements.&#xa;&#xa;Other practical DFM strateg]]></description><pubDate>Mon, 11 May 2026 09&#x3a;28&#x3a;58 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151513&#x2f;A-Simple-Tolerance-Change-That-Can-Significantly-Reduce-Manufacturing-Cost]]></guid><dc:creator>emmagreen</dc:creator><dc:subject>Mechanical Engineering</dc:subject></item><item><title><![CDATA[Outlook PST Password Recovery Software for Instant Access]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151511&#x2f;Outlook-PST-Password-Recovery-Software-for-Instant-Access&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[If you are looking for software that can easily remove passwords from your PST files, use the MailsDaddy Outlook PST Password Remover. The tool is specially designed to remove or reset the forgotten PST passwords without modifying original mailbox data. It supports password removal from large PST fi]]></description><pubDate>Sat, 09 May 2026 08&#x3a;52&#x3a;33 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151511&#x2f;Outlook-PST-Password-Recovery-Software-for-Instant-Access]]></guid><dc:creator>Jyoti06</dc:creator><dc:subject>Commercial Space</dc:subject></item><item><title><![CDATA[Stuck PVC Valve]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151510&#x2f;Stuck-PVC-Valve&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[I am sure I am not the only one who has this problem&#x3a;&#xa;&#xa;A shut of valve for the sink&#x28;S&#x29; that has not been opened since it was installed is now stuck in the open position. It was free when installed, so what has happened ,and does anyone know any tricks to free it up instead of cutting it out and repl]]></description><pubDate>Thu, 07 May 2026 11&#x3a;06&#x3a;49 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151510&#x2f;Stuck-PVC-Valve]]></guid><dc:creator>HiTekRedNek</dc:creator><dc:subject>General Discussion</dc:subject></item><item><title><![CDATA[Undervoltage Relay for Low Voltage Motors]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151509&#x2f;Undervoltage-Relay-for-Low-Voltage-Motors&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[Do you provide dedicated undervoltage protection for low voltage motors below 100 kW&#x3f;&#xd; My understanding is that, in this power range, undervoltage is typically addressed by the overload relay, since a drop in voltage leads to an increase in current.&#xd; In such cases&#x3a;&#xd; Should undervoltage protection be]]></description><pubDate>Thu, 07 May 2026 10&#x3a;12&#x3a;35 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151509&#x2f;Undervoltage-Relay-for-Low-Voltage-Motors]]></guid><dc:creator>Selk</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Sensors and Senseless &#x28;June 2026 Challenge Question&#x29;]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;blogentry&#x2f;30540&#x2f;Sensors-and-Senseless-June-2026-Challenge-Question&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[Scenario&#xa;&#xa;You are the on-call engineer for a hydrogen compressor skid. The control system has five sensors arranged in a serial telemetry chain. Each sensor reports its own reading and passes all upstream readings downstream unchanged.&#xa;&#xa;If exactly one sensor is faulty, it reports an incorrect value]]></description><pubDate>Sun, 31 May 2026 04&#x3a;00&#x3a;00 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;blogentry&#x2f;30540&#x2f;Sensors-and-Senseless-June-2026-Challenge-Question]]></guid><dc:subject>Challenge Questions</dc:subject></item><item><title><![CDATA[Who Watches the Watchmen&#x3f; &#x28;May 2026 Challenge Question&#x29;]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;blogentry&#x2f;30539&#x2f;Who-Watches-the-Watchmen-May-2026-Challenge-Question&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[My watch is 1 second slow.&#xa;&#xa;Your watch is 1.5 seconds fast.&#xa;&#xa;We both agree to stand here until the show the same time again &#x28;12 hr clock&#x29;&#xa;&#xa;Question 1&#x3a; How long will we stand here, waiting for the watches to display the same time&#x3f;&#xa;&#xa;After that we will leave. But we will meet back up when we simultaneo]]></description><pubDate>Thu, 30 Apr 2026 04&#x3a;00&#x3a;00 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;blogentry&#x2f;30539&#x2f;Who-Watches-the-Watchmen-May-2026-Challenge-Question]]></guid><dc:subject>Challenge Questions</dc:subject></item><item><title><![CDATA[Climbing a Ladder in a Pipe &#x28;April 2026 Challenge Question&#x29;]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;blogentry&#x2f;30538&#x2f;Climbing-a-Ladder-in-a-Pipe-April-2026-Challenge-Question&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[A service worker is tasked with replacing some fasteners that are installed on the inner ceiling of a large underground pipe.&#xa;&#xa;The pipe is 12 ft in diameter and she brings with her a 12 ft long ladder. The pipe is perfectly round and is also coated with a very low friction film.&#xa;&#xa;The worker vertical]]></description><pubDate>Tue, 31 Mar 2026 04&#x3a;00&#x3a;00 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;blogentry&#x2f;30538&#x2f;Climbing-a-Ladder-in-a-Pipe-April-2026-Challenge-Question]]></guid><dc:subject>Challenge Questions</dc:subject></item></channel></rss>