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Siguranta 32A - pentru sudura MMA

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Pentru cei care se pricep in domeniul instalatiilor electrice, am cateva nelamuriri:

1. Siguranta aceasta "http://www.castel.ro/siguranta-noark-diferentiala-pn-32a-1914-p Made in Cehia" a fost montata la contorul de energie electrica in urma cu 2h, rezista la sudura MMA (aparat de sudura - tip - transformator - 250c - max 5mm electrod - {14kVA - putere absorbita} ) de intensitate 80A-140A pe electrod rutilic 3,25  - conductor priza 2,5mm?

2. Pentru sudura trebuie sa pun siguranta secundara + conductor mai gros + priza de ebonita sau ceramica? Am cumparat 2 sigurante Schneider "https://www.emag.ro/siguranta-automata-bipolara-schneider-electric-tip-ik60-25a-curba-c-a9k24225/pd/DKK8BFBBM/?X-Search-Id=73fe85d59bae4346a84c&X-Product-Id=45025869&X-Search-Page=1&X-Search-Position=5&X-Section=search&X-MB=0&X-Search-Action=viewhttps://www.emag.ro/siguranta-automata-2p-32a-sca9k24232/pd/DRZGVKBBM/?X-Search-Id=f276ad25c5eac79aaf7f&X-Product-Id=27208819&X-Search-Page=1&X-Search-Position=9&X-Section=search&X-MB=0&X-Search-Action=view" bipolare 25A + 32A + priza Schneider Made in Bulgaria, sunt bune de ceva?

3. Pot sa bag conductorii pe teava PPR 20mm sau trebuie neaparat furtun ignifug/teava PVC pentru izolatie?

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