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  • Users: lbb7
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  1. lbb7

    Class 1 Division 1 & 2 General Question

    I have a bunch of questions when dealing with Class 1 Div. 1 & 2 Hazardous areas. I've looked through the NEC Articles 500 to 510 and the NFPA 496 and I'm still left with some nagging questions. So I will give a little background on what my company does and then I'll just lay out the...
  2. lbb7

    4 Layer PCB Design

    I'm currently working on a 4 layer PCB design. I have to differnet voltages: 120Vac and 5Vdc. Since I'm pretty new to this I'm wondering what the best stack would be for power and ground. Should I keep the voltages completley seperate? Any suggestions or explanations would be much...

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