Updated, taking into account Team Updates 11 and 12 (also updated on the resources page above):
2019_Robot_Rules_Summary-TU12.docx (33.4 KB)
2019_Robot_Rules_Summary-TU12.pdf (185.5 KB)
Also, the official inspection checklist is posted:
Putting in these changes inspired a couple more questions for Q&A:
How to power Servo Power Modules?
Are REV Robotics Servo Power Modules (P/N: REV-11-1144) used as described in R38 powered as CUSTOM CIRCUITS, and if not, how? They are not listed in R34, so both R37 and R52 seem to define them as CUSTOM CIRCUITS, but they affect the power pathways to servos when used as in R38, which seems to violate R63 if they are. Unlike non-embedded fans, they are not listed in table 10-3. If they are CUSTOM CIRCUITS, does R38 allow this exception to R63, provided the PWM signal to the module comes from the RIO as required by R75? If not, what size breaker is allowed for them, and how many may be used per breaker, (that is, where do they fall in table 10-3)?
Do additional fuses protect custom circuit wiring?
The outputs of one 40A PDP port are connected to a CUSTOM CIRCUIT as permitted by table 10.3. The first component of this circuit is a 40A rated fuse panel for purposes of distributing power to several CUSTOM CIRCUITS.
Is the sub-branch circuit fed through each fuse considered protected by thst fuse for purposes of wire sizing (R60)? For example, would a sub-branch in series with a 5A fuse require at least 12AWG wire, or would 22AWG wire be legal?
The first question seems a definite yes as written, as neither the power module nor servos are in the CUSTOM CIRCUIT exception list.
The second is dependent on the definition of a circuit/branch being “protected”. As an inspector, I would permit this in the absence of direct guidance based on my understanding of electrical safety, but I can certainly see the other side of the issue.