My Humax Forum » Freeview HD » FVP 4000T, 5000T

2 annoying problems

(75 posts)
  1. grahamlthompson

    grahamlthompson

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    The fuse is actually to protect the appliance flexible cord. It's time related characteristic is such that any fault that could cause the cord to fail will blow the cartridge fuse first.

    bs1362 fuse time current characteristics

    No fuse will protect a high impedance internal fault where the fault current could actually be less than the normal current. I wouldn't however expect a router to have any sort of signficant fire risk. Billions across the world are left on 24/7 (Anyone ever recall a report of one starting a fire ? ). Comparing one to say a tumbler dryer is frankly derisory. Tumble dryers catch fire because combustible fibres from the clothes get trapped in the exhaust system. Restricted air flow and inadequate air flow monitoring is a recipe for a fire. Miele tumbler dryers turn off if the air flow falls significantly.

    Routers are generally connected via a power block using low voltage DC. In this case the output is near certain to be current limited to a value that will restrict the energy available to a level with insufficient energy to generate any significant heat in the block itself or the router. Bit like expecting a short circuited USB cable to generate a fire. It won't get slightly warm.

    | Wed 27 Apr 2016 10:29:06 #41 |
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    Pollensa1946

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    JohnH77 - 15 minutes ago  » ...2 The exchange does not know you have rebooted your router. All the exchange knows is that the connection has died. It assumes this is a fault and then retrains the line when connection is re-established...4 It could be that more modern equipment takes a shorter time to retrain the line following a loss of connection.

    You're cutting-n-pasting again. Facts might lend some weight to your argument. You know, experience in the industry, your own experience at home, research, documented experiments on the net, etc.

    | Wed 27 Apr 2016 10:35:47 #42 |
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    JohnH77

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    As to fire hazards, some items are designed to be left on 24 x 7, and can safely be left on. I believe routers to be designed for 24 x 7 operation and I treat them as such. So too are items designed to be left in standby.

    Other items are not designed to be left on 24 x 7, and I treat "charging my mobile phone" in that category - it should not be left on 24 x 7.

    Cheap mobile phone/laptop chargers from auction sites are a potential disaster as they often do not comply to UK safety standards. A non-manufacturer's charger can overcharge a lithium battery with too high a current and you do not want to do that. Search youtube with lithium battery fire overcharge or watch Overcharging LiPo battery

    | Wed 27 Apr 2016 10:52:02 #43 |
  4. Biggles

    Biggles

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    grahamlthompson - 16 minutes ago  » .....
    Routers are generally connected via a power block using low voltage DC. In this case the output is near certain to be current limited to a value that will restrict the energy available to a level with insufficient energy to generate any significant heat in the block itself or the router. Bit like expecting a short circuited USB cable to generate a fire. It won't get slightly warm.

    I agree Graham that the router itself is not likely to be a problem. However the power supply being the thing that is plugged into the mains could be a risk in the event of an internal fault. My personal view is that anything unnecessary has mains removed when I'm out. As my internet speed does not show significant change between router switch-ON and being ON for a long time, the router goes OFF. I've known people leave their microwave ON when they go on holiday, is that just in case the burglar fancies a snack???

    | Wed 27 Apr 2016 10:57:49 #44 |
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    Pollensa1946

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    Biggles - 2 minutes ago  » ... My personal view is that anything unnecessary has mains removed when I'm out. As my internet speed does not show significant change between router switch-ON and being ON for a long time, the router goes OFF...

    Yes I agree, if a technical case can be made for leaving something on (obviously a fridge/freezer, PVR etc) then OK. No case can be made for the router, so I switch it off.

    | Wed 27 Apr 2016 11:03:10 #45 |
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    JohnH77

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    I've known people leave their microwave ON when they go on holiday, is that just in case the burglar fancies a snack???

    Do you know, I am very safety conscious, but I never give the microwave oven a second thought when I go away, so any burglar is going to be in for a treat (if he can get past the cat).

    My microwave oven stays on 24 x 7 x 365 as it is designed to be left on and in standby it runs at the tiny wattage necessary to power the clock.

    | Wed 27 Apr 2016 11:05:03 #46 |
  7. grahamlthompson

    grahamlthompson

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    Pollensa1946 - 2 minutes ago  » 

    Biggles - 2 minutes ago  » ... My personal view is that anything unnecessary has mains removed when I'm out. As my internet speed does not show significant change between router switch-ON and being ON for a long time, the router goes OFF...

    Yes I agree, if a technical case can be made for leaving something on (obviously a fridge/freezer, PVR etc) then OK. No case can be made for the router, so I switch it off.

    Being a bit of a insomniac, I often play iplayer radio content on headphones in the middle of the night to send me back to sleep. Pretty sure some of my boxes use the internet during the night as well. My Foxsat-hdr sends me a changes e-mail after housekeeping every night. I won't be turning off my router.

    | Wed 27 Apr 2016 11:08:38 #47 |
  8. Biggles

    Biggles

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    I know this has been off topic but I feel the less technical among us deserve to know that urban myths are not necessarily based on fact, repetition on the internet is not proof.

    | Wed 27 Apr 2016 11:15:51 #48 |
  9. Biggles

    Biggles

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    JohnH77 - 14 minutes ago  » 

    I've known people leave their microwave ON when they go on holiday, is that just in case the burglar fancies a snack???

    Do you know, I am very safety conscious, but I never give the microwave oven a second thought when I go away, so any burglar is going to be in for a treat (if he can get past the cat).
    My microwave oven stays on 24 x 7 x 365 as it is designed to be left on and in standby it runs at the tiny wattage necessary to power the clock.

    Re-read Pollensa1946's post #31.

    | Wed 27 Apr 2016 11:21:03 #49 |
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    Pollensa1946

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    grahamlthompson - 9 minutes ago  » ... I won't be turning off my router.

    No problem with that. I'm just not in agreement with people who make a general case based simply on their beliefs.

    | Wed 27 Apr 2016 11:21:12 #50 |

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