No, the jockey pump should not have an OCPD sized to carry the LRC. The jockey pump does not fall under the rules of article 695. See 695.1(B)(2).
The jockey pump motor should be protected in accordance with Art. 430.
I have to respectively disagree with the suggestion that the OCP does not have to be sized to carry the sum of the LRC of the fire pump plus the LRC of the jockey pump (pressure maintainence pump)
So it will be the same for applicatons with non-electric fire-pump motor. The pressure maintainence pump will have OCPD at LRA. Thanks.
Article 695(B) (2), clearly states that jockey pumps are not covered in 695 unless they are fed from the fire pump circuit(s). 695.4(B)(1) ".....when connected to this power supply."
When a jockey pump is NOT connected to the fire pump supply, it is treated as a typical motor per article 430.
This issue has been brought up a number of times in proposals. Bellow is one the the more recent. The submitter also thinks it isn't clear.
I don't see anything in the code to support this statement. 695.1(B)(2) says Jockey Pumps are Not Covered by Article 695. There is nothing about "unless" they are connected to the fire pump power supply.
The Jockey Pump should be protected in accordance with Article 430 if it is connected to the fire pump supply, and it should be protected in accordance with Article 430 if it is not connected to the fire pump supply.
Yes, I did read 695.4(B)(1). I don't see anything in it that says that the requirements of Art 695 should be applied to the conductor sizing or OCPD sizing for a Jockey Pump. Did you read 695.1(B)(2)? It says Article 695 does NOT cover Jockey Pumps.Did you read 695.4(B)(1)?
I quoted the last part of the first sentence, "...when connected to this(fire pump) power supply. The jockey pump is allowed, but not required to be connected to the fire pump circuit. So, if you do indeed connect it to the fire pump circuit, you must use LRC for all pumps of that circuit.
Furthermore, the last sentence states: The requirement to carry the locked-rotor currents indefinitely shall not apply to conductors or devices other than overcurrent devices in the fire pump motor circuit(s).
If the fire pump circuit also serves the jockey pump, then the circuit must be LRC.
I certainly agree that there is some confusion with 695.4, but I don't see any confusion in the requirements of circuiting a jockey pump.
David- You are trying to simplify a complicated code article by totally ignoring the words in 2008 NEC 695.4(B)(1).
Just so you understand: A pressure maintenance pump motor as described in this article is a JOCKEY PUMP.A jockey pump, or a pressure maintenance pump, is a small apparatus that works in conjunction with a fire pump as part of a fire protection sprinkler system. A jockey pump is designed to keep the pressure elevated in a fire suppression system so that the main fire pump is prevented from running unless absolutely necessary. It consists of a motor, a pump, and a controller.
Words mean things! I'll ignore your sarcasm just so we at this forum can actually have a discussion and move beyond 695.1(B).
Rarely do designers, engineers or electricians use the fire pump circuit to also supply the jockey pump. Typically, the jockey pump is fed with its own separate circuit in accordance with article 430. However, unlike you, I apply the entire code when interpreting. So if you want to totally disregard an entire sub-section of the code, then there is nothing I can do about that except point out you error.
I stated repeatedly that a jockey pump is normally fed per article 430, but you chose to ignore that as well.
Certainly, if an engineer chooses to use the fire pump circuit to also supply the jockey pump, the jockey pump would ultimately be wired and fused per article 430. Nobody has suggested an OCPD based on the LRC of the fire pump and its associated motors would be directly connected to the jockey pump without proper OCP per article 430.
I can only assume that is what you thought. But we tried to repeatedly explain there is a separate rule that allows the fire pump circuit to also carry the power for the jockey pump, provided that the jockey pump is ultimately connected per article 430.
There are controllers that have separate OCPD in them for the jockey pump. That means ONE CIRCUIT that serves the fire pump and..........jockey pump, as allowed in 695.4(B)(1).
If you don't agree with the rule, then try to have it changed. If you believe it means something else, then lets here it, but don't act like it does not exist.
BTW, I do not have my 2008 handbook, but the 2011 Handbook, 695.4(B)(2), gives an example of my interpretation on page 1146.It clearly states to add the LRC of the fire pump and the jockey pump to size the LRC for the combined circuit.