Search:

Type: Posts; User: cornbread

Page 1 of 8 1 2 3 4

Search: Search took 0.02 seconds.

  1. Replies
    1$$
    Views
    917

    Is there a downside to using LOTO for this? ...

    Is there a downside to using LOTO for this?

    I think I would err on the side of caution, unless the LOTO creates problems?
  2. Replies
    7$$
    Views
    1,511

    Surprised by the responses. I realize checking...

    Surprised by the responses. I realize checking the circuit is required, but I like the visual indication that the stabs are dis-engaged. I have no way of knowing what going on inside the molded...
  3. Replies
    7$$
    Views
    1,511

    MCC's with fuses or molded case breakers

    We are having a debate at our site on the safety aspects of using MCC's with fused disconnect vs disconnect that use a molded case breaker. My belief is the fused disconnects are safer as I have a...
  4. Replies
    6$$
    Views
    1,764

    Thanks appreciate the heads up on this!

    Thanks appreciate the heads up on this!
  5. Thread: LOTO

    by cornbread
    Replies
    2$$
    Views
    1,063

    I'll 2nd...

    I'll 2nd https://www.e-hazard.com/arc-flash-training/
  6. Thread: New Chemical

    by cornbread
    Replies
    14$$
    Views
    2,502

    No room for an isolation wall. Our HAC committee...

    No room for an isolation wall. Our HAC committee is taking matter under its control and they are using this thread couple with other feed back obtained to determine the area classification bubble. ...
  7. Thread: New Chemical

    by cornbread
    Replies
    14$$
    Views
    2,502

    The conversation was around NFPA 497. I kind of...

    The conversation was around NFPA 497. I kind of see where batch versus continuous could be argued based on volume.

    Sect 5.5.6 5.5.6
    The volume of combustible material released is of extreme...
  8. Thread: New Chemical

    by cornbread
    Replies
    14$$
    Views
    2,502

    Unfortunately the company restrict us from any...

    Unfortunately the company restrict us from any specifics.... probably on the edge for asking the question. I do appreciate the replies. I have reached out to several other resources and one...
  9. Thread: New Chemical

    by cornbread
    Replies
    14$$
    Views
    2,502

    Don't know all the history but I suspect early on...

    Don't know all the history but I suspect early on the area was standard and has been evolving. Luckily the process engineer engaged our HAC team to look at the introduction of the new chemical. Just...
  10. Thread: New Chemical

    by cornbread
    Replies
    14$$
    Views
    2,502

    New Chemical

    We are adding a new chemical in our process that will expand the HAC bubble to about 25 ft 3ft off the floor. Existing today I have several PLC panels & other equipment that will be inside the...
  11. Replies
    1$$
    Views
    508

    Cable tray estimator

    Anyone know of a good source or software to help with estimating cable tray? Looking for general cost per foot of tray and installation.
  12. Replies
    10$$
    Views
    2,537

    Appreciate the feedback. I was taken aback when...

    Appreciate the feedback. I was taken aback when the discussion came up. Typically its the production folks that don't want to shut anything off .. surprised to hear the electrical guys lobbying...
  13. Replies
    10$$
    Views
    2,537

    Energized work

    Had a interesting discussion at our last electrical safety committee about energized work and energized work permits. We have a project where we need to add a MCC bucket to AB line up. We were...
  14. Replies
    1$$
    Views
    866

    NFPA 70E & VFD Safe Torque option

    Here is what I have a drive feeding a 30 HP motor with a Killark plug & Socket as local disconnect. The Killark socket is a interlocked disconnect with an auxiliary early break contact that is part...
  15. Please forgive me as I'm going off some old...

    Please forgive me as I'm going off some old memories. We looked at the AEGIS grounding ring and I thought we talked to one of the approved motor repair shops and as I recall they could retrofit...
  16. Replies
    10$$
    Views
    1,783

    Appreciate the replies. After some more research...

    Appreciate the replies. After some more research we are going to do a fall of potential test, visual inspection, static bonding review and some continuity test. Hopefully this will give us the info...
  17. Replies
    10$$
    Views
    1,783

    This is a high warehouse and I can find only two...

    This is a high warehouse and I can find only two grounds... I'm sure there are more but they may be buried. The warehouse has 4 0r 5 2000 KVA transformer feeding it.. 13.8 KV to 480V. My concern is...
  18. Replies
    10$$
    Views
    1,783

    Appreciate the replies. I'm use to new...

    Appreciate the replies. I'm use to new installations where we ground everything. Will take a look at 250 and see where that leads.
  19. Replies
    10$$
    Views
    1,783

    Ground testing building

    I'm hoping the esteemed group can help. Our company recently purchased a warehouse and plans to put a few production machines into the space. My question is ... how best to test the grounding for...
  20. Replies
    26$$
    Views
    5,205

    Typical safety relays I've used have two contact...

    Typical safety relays I've used have two contact in series, so it would have to fail both set of contacts at the same time. I have seen impedance problems (solid state output feeding a solid state...
  21. Replies
    7$$
    Views
    901

    The thought process is to keep the old stuff...

    The thought process is to keep the old stuff going until we have the new substation in place..IE different location that our existing sub. I would prefer a new block structure but I keep reading...
  22. Replies
    7$$
    Views
    901

    Our reliability group has determined the...

    Our reliability group has determined the switchgear and transformer are at the end of life.. (> 40 years).
  23. That's what I get for posting with out my 1 st...

    That's what I get for posting with out my 1 st cup of coffee.
  24. I've been doing MNT for years and in my humble...

    I've been doing MNT for years and in my humble opinion you would be better served to monitor vibration. Have not seen too many motors fail electrically, most fail due to bearings. Just one old mans...
  25. Replies
    7$$
    Views
    901

    Pre fab susbtation Pros & cons

    We are looking at replacing one of our 480 Volt subs. Being old school I prefer a block building to house my switchgear. The new school prefers pre fab buildings (elevated for bottom entry). ...
Results 1 to 25 of 200
Page 1 of 8 1 2 3 4