socket swt mech only dp 20a

Automatic Single Switch Socket Outlet, 250VAC, 20A, 2 Pole

Catalogue Number: 10MD20
socket swt mech only dp 20a
Colour: White Electric
Colour: Per UOM Std.
  • White Electric 1 PCE
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Range of product
Standard Series
Product brand
Quantity per set
set of 1
Cover type
complete housing
without marking
Local signalling
without light indicator
Device mounting
Fixing mode
by screws
[In] rated current
20 A
[Ue] rated operational voltage
250 V AC
33 mm
60 mm
42 mm
Fixing center
50 mm
Number of poles
  • AS/NZS 3100
  • AS/NZS 3112
  • AS/NZS 3133:approval number S/1
    • EU RoHS Directive
      Environmental Disclosure
      Circularity Profile

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      Frequently Asked Questions

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      Is 40MD20 double pole, single throw switch mechanism?

      Yes, 40MD20 is an Iconic double pole single throw switch mechanism rated to 20AX, 250V, 1 way.
      For further information, please visit

      Can a Clipsal 30MD20 be used as a changeover switch?

       No - It is just a 2 pole switch
      But a 30MD2 is a 2p 2way (6 terminals)

      Is the 30MD20 double pole double throw?

      No, the 30MD20 is a double pole single throw.
      The 30MD2 is a double pole double throw switch, however it has a 10A rating.

      Some of the key features are:
      • 6 terminal bores of 4.1 mm diameter accommodate 4 x 1.5 sq mm or 3 x 2.5 sq mm cable
      • Motor rating is 75

      For further information please visit


      What is the part number of the replacement sockets for CFFB?

      10MDP is the part number of the replacement socket to suit CFFP.
      For further information on 10MDP, please visit

      The Clipsal 30M20 is discontinued, What is the alternative part?

      The alternative part for the Clipsal 30M20 is the 30USM: Universal Rocker Switch, 1-Way/2-Way, 250VAC, 20A.

      What size cable will the T100-BK terminals accomodate?

      10mm2 to 50mm2

      Unable to set the Mask and the Gateway settings from the front display of the Series 800 Power Meter (PM800) with a PM8ECC installed.

      The Ethernet mask and the gateway cannot be configured from the front panel.

      PM800 Series Power Meter, PM8ECC

      PM800 Series Meter Series 800 with PM8ECC

      When configuring the first Octet of the TCP/IP address from the front panel display of the Series 800 Power Meter (PM800) with a PM8ECC installed, if the first octet (most significant) is configured with a number less than 16 then the mask and gateway configuration screens never appear.  This issue occurs only in version 10.600 PM800 meter firmware. Version 10.600 was the first firmware release that supported the PM8ECC.

      Note: This issue does not occur when using the IE browser to configure the IP address.

      This issue was resolved in version 10.820 PM800 OS firmware or higher. If currently installed firmware is V10.600  and less than V10.820 download the latest firmware to correct this issue.
      Access to firmware upgrade instructions, including a how-to video and a link to the latest firmware can be found at:

      If only the firmware is required, it can be downloaded directly from:

      Or alternatively,

      1) Using a internet browser navigate to
      2) select Support, then Download Center from the Green menu bar
      3) type "PM800 Series V12.500 Firmware" into the search bar and click on the Search button
      4) click on the "PM800 Series V12.500 Firmware" link presented in the search results
      5) click on the Download button to start the download and save the file

      Note: Also by entering only PM800 and/or keyword search criteria into the search bar, you be find wide variety of PM800 related documents.

      Disconnecting and Reconnecting a Configured RS232-Based Sensor or Output Control Device Can Cause Device Settings to be Lost


      Disconnecting and Reconnecting a Configured RS232-Based Sensor or Output Control Device Can Cause Device Settings to be Lost

      Product Line:



      NetBotz and RS232 sensor connections


      Settings associated with RS232-based sensors or output control devices may not be preserved if the device is disconnected and then reconnected.


      Once you have connected and configured settings for an RS232-based sensor or device, do not disconnect or relocate this device unless you are prepared to reconfigure the device.

      Will the NetShelter SX leveling feet support the full weight of the cabinet and its contents?

      Can the full weight of the NetShelter cabinet rest on the leveling feet?
      Product Line:
      NetShelter SX
      All versions and serial ranges.
      Customers may want to lift the cabinet off the castors and need reassurance that the leveling feet can bear the full weight of the cabinet and it's contents. (static load rating)
      Yes, the leveling feet can support the cabinet up to the rated static load rating of the cabinet.  
      Knowledge Base document FA158656 also contains information regarding shipping load, dynamic load and static load ratings.

      Can the 10MDP be purchased in black ?

      10MDP are not available as a standard part in black but can be ordered as a special. This will need to be quoted and there is a minimum Quantity buy of 50.

      Authentication Failure Issue; Network Management Card (NMC) Based Products

      Authentication Failure Issue; UPS Network Management Card (NMC) Based Products
      Mr. Todd Bertolozzi, CCNA and Mr. Christopher Walter, CISA, GCIH, notified APC of a high risk security vulnerability that affects APC UPS Network Management Card (NMC) based devices. Following is a description of this issue and actions underway by APC to mitigate and correct the issue. This report is a result of an effort by a security analyst to determine vulnerabilities with APC products.


      As reported, the UPS NMC is vulnerable to a web user interface authentication failure attack.

      Product Line
      • Network Management Card 1 (NMC1) - AP9617, AP9618, AP9619
      Devices with an embedded Network Management Card 1 include (but are not limited to): Metered/Switched Rack PDUs (AP78XX, AP79XX), Rack Automatic Transfer Switches (AP77XX, Environmental Monitoring Units (AP9320, AP9340, Netbotz 200)
      • Network Management Card 2 (NMC2) - AP9630/AP9630CH, AP9631/AP9631CH, AP9635/AP9635CH
      Devices with an embedded Network Management Card 2 include (but are not limited to): 2G Metered/Switched Rack PDUs (AP86XX, AP88XX, AP89XX), Certain Audio/Video Network Management Enabled products.

      • AP9630/31 NMC2 based devices running the following applications:
        • Smart-UPS v5.1.0 (SFSUMX510)
        • Symmetra v5.1.0 (SFSY510)
        • Symmetra 3 Phase v5.1.0 (SFSY3P510)
      • AP9617/18/19 NMC1 based devices running the following applications:
        • Smart-UPS v3.7.1 (SFSUMX371)
        • Symmetra v3.7.1 (SFSY371)
        • xPDU v3.7.1 (SFXPDU371)
        • Symmetra 3 Phase v3.7.1 (SFSY3371)
        • Silcon v3.7.1 (SFDPE3E371)

      During the investigation of the reported matter, the reported and actual issue was found to be identical. While the reported issue was specific to the Smart-UPS device, this issue exists across recently released versions of UPS NMC based applications.
      APC has released a firmware revision to address this issue, available for immediate download here.

      If you choose not to utilize the above solution, the following mitigation strategies can be employed to reduce or eliminate the potential for this issue to manifest.
      • As this authentication failure bases itself in use of a URL in web applications, disabling the web interface on the UPS NMC will eliminate the possibility of such vulnerability from occurring. Other interface methods such as Telnet, SNMP, and serial connections are unaffected by this issue. Note the web interface can be disabled via the config.ini or via any other interface. See the UPS NMC documentation for detailed instructions.
      • Placement of the UPS NMC on a private or secure network (e.g. behind a firewall) will prevent external unauthorized users from a accessing the UPS NMC.
      • Changing the default ports used by the UPS NMC for transacting web based information (e.g. port 80 for HTTP, and port 443 for HTTPS) to a non-standard port will mask the issue.
      • APC recommends implementing industry standards including administrator access to computers and the operation of security scanners.
      APC Actions:

      As APC is concerned about any potential vulnerability no matter how narrow, we are undertaking the following steps to contain and correct this issue:
      • APC has removed the effected firmware versions from the appropriate download locations.
      • APC has made a complete report of this finding to the individual responsible for finding the vulnerability.
      • APC has implemented a firmware fix for the detailed issue for each relevant application. They are readily available to the general public via our web site (
      • APC will send out an email notification to those customers who have signed up to receive APC's Software & Firmware release update newsletters.


      Trio Radio Installation - Grounding Antennas, Towers and Cabinets.

      There's a general lack of understanding of how to provide lightning protection for radios, antennas and towers. Many installers either ignore the issue, do the minimum possible, or sometimes even cause significant problems with their installation. Below is a brief discussion of common issues.

      1) Typically the antenna itself does not need to be grounded by the installer. The antenna is mounted with a metal clamp on a metal pole, which must be grounded.


      2) If the antenna is a yagi, (directional type) it's a good idea to mount the antenna several feet below the top of the mast (spacing at least equal to antenna's length) to allow the mast to take the main hit on a lightning strike.

      3) If the antenna is an omnidirectional type it's often mounted at the very top, though some are mounted on arms 2-3 feet out on the side of a tower. Many of these types are "DC grounded" which means the radiating element goes thru a coil to ground, allowing static buildup to be bled off as it tries to develop. This is often sufficient, but in some very heavy lightning areas installers may run a lightning rod around the omni and a few feet above. It must be kept well away from the antenna (a couple of feet) so it's a bit awkward but hardware does exist.

      4) If the tower is tall a cable grounding clamp should be installed every (approx) 75 feet which grounds the coax outer shield to the tower itself. This bares the outer shield (braid) so care must be taken to waterproof the cable/clamp afterwards.

      5) A good quality surge arrestor (eg polyphaser) must be used at the building entrance. It may be mounted in a metal feed-through plate, may be a simple in-line type, but must be connected to a heavy gauge ground cable or strap.

      6) The ground cable from the surge arrestor must be heavy green ground cable, kept as short and straight as possible with NO coils and no sharp bends. These add inductance, which acts as a resistance to the high frequency energy of a lightning strike.


      7) Ground cables must not run through metal conduit. This adds impedance and can pick up noise.

      8) Be aware that surge arrestors will fail after a period of time, either from absorbing one big surge or multiple smaller surges. This may appear as either an open circuit or more commonly as a source of high VSWR. (reflected power) Keep a spare handy and try swapping out the unit at site if high VSWR is seen.

      9) A surge arrestor is not truly a lightning arrestor. A direct hit to the antenna may send enough energy through the system that the arrestor is overwhelmed, causing serious damage to the radio and attached equipment. A surge arrestor is primarily aimed at bleeding off the buildup of static charge to prevent a lightning strike in the first place.

      10) The ground cable must go to an industrial quality ground rod or plate, installed according to local regulations or better. This must be an 8 or 10 foot rod.

      11) All grounds should go to a common point eg a metal plate at the building cable entry point. Daisy-chained ground connections must be avoided.

      12) The mast (if short eg 10-20 ft) must be grounded at the bottom with a short straight cable to a ground rod. Preferably a separate one but at a site where a short mast and the cabinet are close together often one rod is used.

      13) If a small antenna structure is used a single long ground rod may be used at its base, but for a normal tower a ground ring should be installed with 3 or more ground rods, a ring of heavy copper wire connecting them, and several cables running out from the tower.


      The above comments are general in nature. Several very good websites exist with far more information about grounding procedures and hardware. A quick Google search should find plenty of good reading.


      Equipment connected to a Back-UPS product turns off unexpectedly and/or reboots.


      There are many possible scenarios in which a Back-UPS product might drop or reboot the attached equipment. Below are potential problems ordered by commonness.

      Product Line:

      All APC Back-UPS and Conext related products.



      Cause / Resolution:

      Problem #1: Equipment connected to the wrong outlets
      Investigation: Follow the input power cord of the equipment that shut off back to the outlet that it is plugged into on the Back-UPS product, if the outlet’s label does not have the words “battery backup” this is why it has dropped the load.
      Solution: Not all the outlets on a Back-UPS product provide backup power in the case of a power disturbance. Unplug the equipment and make sure your vital equipment gets plugged into the outlets labeled Battery Backup. Any thing that does not require backup power should be plugged into the surge protection only outlets.

      Problem #2: Capacity overload
      Investigation: In the technical specification section of the user’s manual that came with the Back-UPS product there is a watt rating listed. That is the maximum wattage that can be attached to the Battery Backup outlets and still have a decent runtime in the event of a power problem. If there is too much attached it will not be able to be supported by the battery. Make a list of all the equipment that is being plugged into the Back-UPS product.
      Solution: Determine what equipment would be required to stay on in the event power failed for an extended period of time. These are the things that will need to be plugged into the battery backup outlets. The rest should be plugged into the surge only outlets that do not provide battery backup. If the total Wattage of the equipment that is being plugged into the battery outlets is more than the wattage of the battery outlets then the Back-UPS product will NOT be able to support that equipment in the case of a power disturbance.
      You can confirm at if your Back-ups product is to small or not.


      Problem #3:The Circuit Breaker tripped:
      Investigation: Check the circuit breaker located on the rear of the UPS or near the input cord. The circuit breaker is labeled ""Press to Reset"". The circuit breaker will ""trip"" or pop out if there is a severe overload on the output side of the UPS (i.e., too much equipment is plugged into the UPS).
      Solution: Reducing the load, then press the ""Reset"" button in. If the circuit breaker is tripped if it protrudes approximately 1/4"" out from the unit. Once pushed back in, try to power the unit up again. If breaker will NOT stay in, contact APC at Technical Support and have the Model and serial number available.

      Problem #4: The UPS exhausted its available battery power
      Investigation: Back-UPS products can only supply battery power for a limited time before the unit must shutdown to protect itself from totally discharging. In some cases, depending on the size of the load and the size of the Back-UPS product's batteries, it may only have a few minutes of battery power. Try to determine if the UPS had been on battery shortly before the attached equipment has shutdown. Keep in mind that while normal power may seem to exist, many power problems are transparent or invisible to a user. These unforeseen power problems, such as voltage wave shape distortion, Harmonic Distortion, and frequency variances, will cause the UPS to go to battery. You may have found that your UPS has been going to battery but only for a very short amount of time. So, what may be happening is that it is going to battery frequently enough that the unit has not had enough time to recharge. Eventually, then, the UPS will shutdown (and drops all attached equipment).
      Solution: This would not happen if the software that the Back-UPS product shipped with was installed. It can be configured to Gracefully perform and unattended shutdown. Then when power returned to acceptable it would return power to its outlets and if the equipment is configured properly it should reboot. If this happens often without there being a black out condition then most Back-UPS products can be Desensitized via either the front switch (If this is possible the instructions will be stated in the Back-UPS product’s user manual) And/or through the APC management software that the Back-UPS product shipped with. An example of the management software is PowerChute Personal Edition.

      Problem #5: Connected equipment does not accept a stepped-approximated sine wave.
      Investigation: This would be the case if only one of the pieces of equipment plugged into the battery backup outlets dropped while the other equipment in the battery backup outlets stay on when the unit transferred o battery power.
      Solution: Back-UPS products output a step approximation of a sine wave when the unit is On Battery. While this kind of waveform is ideal for computers and computer-related equipment, it may not be compatible for other types of loads like motor loads. If you are using non-computer loads with one of the above mentioned UPS's, consult the manufacturer's specifications to determine if the equipment can run off of a ""stepped wave"". If it can't, then it will require a UPS which outputs a pure sine wave when On Battery. APC UPS single phase models which do output a Pure Sine Wave include: Smart-UPS >700VA, Matrix-UPS, and the Symmetra LX.

      Problem #6: The power supply in your equipment is faulty and incapable of handling the transfer time of the Back-UPS product
      Investigation: This would be the case if only one of the pieces of equipment plugged into the battery backup outlets rebooted while the other equipment in the battery backup outlets stay on when the unit transferred o battery power.
      Solution: Depending on the model of the UPS, the transfer time (time it takes for the unit to transfer from On Line to On Battery) can vary anywhere from 2 milliseconds to 8 milliseconds. Modern computer and computer-related power supplies can ""ride through"" power outages as long as 10-20 milliseconds. Many, in fact, can last through a 50 millisecond gap in power. If the equipment is rebooting when the Back-UPS product transfers to On Battery operation, this may be the problem. Try to recreate the problem by connecting another device, pull the plug on the UPS (puts it on battery) to see if the new device stays up and running when the UPS goes to Battery. If it does, then its more likely that there is a problem with the power supply of the original piece of equipment. The manufacturer of the equipment will need to be inquired upon for further support in this situation.

      Problem #7: Communication cable is attached but no APC management software is installed.
      Investigation: On most Back-UPS products there is either a Data port, Serial port or USB port available for communication with a computer. The software is optional not mandatory. Check the Back-UPS product and see if there is anything attached to this port. If there is and there is no sign of APC management software installed on the computer there is a slight chance that the Back-UPS product might turn off for no apparent reason.
      Solution: Either remove the cable and do not installed the software since its optional not mandatory, or leave the cable attached and properly install the software according to the instructions in the Back-UPS product’s user’s manual.

      Problem #8: The UPS may be faulty
      In order to receive advanced troubleshooting assistance please refer to our support page at to leave an e-mail of exactly what you are experiencing. Please include the exact model and serial number of the unit which can be found on a white sticker located on the back bottom or side of the Back-UPS product.